• UIA
    • UIA Missing - Chybi Praga 1967 [Známka 1622] [Stamp 1622]
  • UIT
    • UIT Missing - Chybi [Známka 2581] [Stamp 2581]
  • ULD
    • ULD Missing - Chybi Prague 1960 [Známka 1192] [Stamp 1192]
  • UN
    • 20th Anniversary of the Signing of the UN Missing - Chybi Charter [Známka 1454] [Stamp 1454]
    • 20 Years of the UN Missing - Chybi [Známka 1455] [Stamp 1455]
    • UN Missing - Chybi - 25 Years [Známka 1833] [Stamp 1833]
    • UN Missing - Chybi 35 Years [Známka 2442] [Stamp 2442]
    • 2nd Special Session of the UN Missing - Chybi General Assembly on Disarmament, New York 1982 [Známka 2541] [Stamp 2541]
    • 2nd UN Missing - Chybi Conference on the Exploration and Peaceful Uses of Outer Space [Aršik 2544] [Souvenir Sheet 2544]
  • UNECEF
    • UNECEF Missing - Chybi 1946-1986 [Známka 2750] [Stamp 2750]
    • UNECEF Missing - Chybi 1946-1986 [Známka 2751] [Stamp 2751]
    • UNECEF Missing - Chybi 1946-1986 [Známka 2752] [Stamp 2752]
    • UNECEF Missing - Chybi 1946-1986 [Známka 2753] [Stamp 2753]
    • UNECEF Missing - Chybi 1946-1986 [Známka 2754] [Stamp 2754]
  • UNESCO
    • UNESCO Missing - Chybi Friendship for the Children of the World Contest [Známka 1023] [Stamp 1023]
    • UNESCO Missing - Chybi Peace Contest [Známka 1024] [Stamp 1024]
    • UNESCO Missing - Chybi We Want to Live with Peace and Joy Contest [Známka 1025] [Stamp 1025]
    • UNESCO Missing - Chybi [Známka 1331] [Stamp 1331]
    • UNESCO Missing - Chybi [Známka 1332] [Stamp 1332]
    • UNESCO Missing - Chybi [Známka 1333] [Stamp 1333]
    • UNESCO Missing - Chybi [Známka 1334] [Stamp 1334]
    • UNESCO Missing - Chybi [Známka 1335] [Stamp 1335]
    • UNESCO Missing - Chybi [Známka 1336] [Stamp 1336]
    • UNESCO Missing - Chybi [Známka 1365] [Stamp 1365]
    • UNESCO Missing - Chybi [Známka 1366] [Stamp 1366]
    • UNESCO Missing - Chybi [Známka 1367] [Stamp 1367]
    • UNESCO Missing - Chybi [Známka 1368] [Stamp 1368]
    • UNESCO Missing - Chybi R. Rolland 1860-1944 [Známka 1504] [Stamp 1504]
    • 20 Years of UNESCO Missing - Chybi 1946-1966 [Známka 1515] [Stamp 1515]
    • Petr Bezruc 1867-1967 UNESCO Missing - Chybi [Známka 1623] [Stamp 1623]
    • Karel Marx 1818 UNESCO Missing - Chybi [Známka 1664] [Stamp 1664]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1722] [Stamp 1722]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1723] [Stamp 1723]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1724] [Stamp 1724]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1725] [Stamp 1725]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1726] [Stamp 1726]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1727] [Stamp 1727]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1728] [Stamp 1728]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1768] [Stamp 1768]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1769] [Stamp 1769]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1770] [Stamp 1770]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1771] [Stamp 1771]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1772] [Stamp 1772]
    • Czechosloval UNESCO Missing - Chybi Commission [Známka 1773] [Stamp 1773]
    • UNESCO Missing - Chybi [Známka 1810] [Stamp 1810]
    • UNESCO Missing - Chybi [Známka 1811] [Stamp 1811]
    • UNESCO Missing - Chybi [Známka 1812] [Stamp 1812]
    • UNESCO Missing - Chybi [Známka 1813] [Stamp 1813]
    • UNESCO Missing - Chybi [Známka 1814] [Stamp 1814]
    • UNESCO Missing - Chybi [Známka 1815] [Stamp 1815]
    • UNESCO Missing - Chybi [Známka 1884] [Stamp 1884]
    • UNESCO Missing - Chybi [Známka 1885] [Stamp 1885]
    • UNESCO Missing - Chybi International Year of the Book 1972 [Známka 1946] [Stamp 1946]
    • UNESCO Missing - Chybi [Známka 2077] [Stamp 2077]
    • UNESCO Missing - Chybi [Známka 2078] [Stamp 2078]
    • UNESCO Missing - Chybi [Známka 2079] [Stamp 2079]
    • UNESCO Missing - Chybi [Známka 2080] [Stamp 2080]
    • UNESCO Missing - Chybi [Známka 2081] [Stamp 2081]
    • UNESCO Missing - Chybi [Známka 2182] [Stamp 2182]
    • UNESCO Missing - Chybi [Známka 2183] [Stamp 2183]
    • UNESCO Missing - Chybi [Známka 2184] [Stamp 2184]
    • UNESCO Missing - Chybi 1946-1976 [Známka 2211] [Stamp 2211]
    • UNESCO Missing - Chybi [Známka 2292] [Stamp 2292]
    • Man and the Biosphere UNESCO Missing - Chybi [Známka 2383] [Stamp 2383]
    • Man and the Biosphere UNESCO Missing - Chybi [Přepážkovy list 2383] [Minisheet 2383]
    • Man and the Biosphere UNESCO Missing - Chybi [Známka 2384] [Stamp 2384]
    • Man and the Biosphere UNESCO Missing - Chybi [Přepážkovy list 2384] [Minisheet 2384]
    • Man and the Biosphere UNESCO Missing - Chybi [Známka 2385] [Stamp 2385]
    • Man and the Biosphere UNESCO Missing - Chybi [Přepážkovy list 2385] [Minisheet 2385]
    • Man and the Biosphere UNESCO Missing - Chybi [Známka 2386] [Stamp 2386]
    • Man and the Biosphere UNESCO Missing - Chybi [Přepážkovy list 2386] [Minisheet 2386]
    • UNESCO Missing - Chybi [Kupon 2388] [Coupon 2388]
    • UNESCO Missing - Chybi [Kupon 2389] [Coupon 2389]
    • UNESCO Missing - Chybi [Kupon 2390] [Coupon 2390]
    • UNESCO Missing - Chybi [Kupon 2391] [Coupon 2391]
    • UNESCO Missing - Chybi [Kupon 2392] [Coupon 2392]
    • UNESCO Missing - Chybi [Známka 2475] [Stamp 2475]
    • UNESCO Missing - Chybi [Známka 2480] [Stamp 2480]
    • 100th Birth Anniversary - UNESCO Missing - Chybi [Známka 2514] [Stamp 2514]
    • 100th Birth Anniversary - UNESCO Missing - Chybi [Známka 2516] [Stamp 2516]
    • (100th Birth Anniversary - UNESCO Missing - Chybi ) [Známka 2517] [Stamp 2517]
    • 10th International Exhibition of Children's Art Lidice ( UNESCO Missing - Chybi ) [Známka 2538] [Stamp 2538]
    • 10th International Exhibition of Children's Art Lidice UNESCO Missing - Chybi [Aršik 2538] [Souvenir Sheet 2538]
    • (100th Birth Anniversary - UNESCO Missing - Chybi ) [Známka 2542] [Stamp 2542]
    • UNESCO Missing - Chybi [Známka 2575] [Stamp 2575]
    • UNESCO Missing - Chybi [Známka 2577] [Stamp 2577]
    • UNESCO Missing - Chybi [Známka 2613] [Stamp 2613]
    • UNESCO Missing - Chybi [Aršik 2613] [Souvenir Sheet 2613]
    • (200th Birth Anniversary - UNESCO Missing - Chybi ) [Známka 2676] [Stamp 2676]
    • UNESCO Missing - Chybi [Známka 2678] [Stamp 2678]
    • (100th Birth Anniversary - UNESCO Missing - Chybi ) [Známka 2726] [Stamp 2726]
    • (100th Birth Anniversary - UNESCO Missing - Chybi ) [Známka 2772] [Stamp 2772]
    • (100th Birth Anniversary - UNESCO Missing - Chybi ) [Známka 2772] [Stamp 2772]
    • Jan Evangelista Purkyne - 1787-1987 - UNESCO Missing - Chybi [Známka 2811] [Stamp 2811]
    • 100th Birth Anniversary - UNESCO Missing - Chybi [Známka 2820] [Stamp 2820]
    • 100th Birth Anniversary - UNESCO Missing - Chybi [Známka 2821] [Stamp 2821]
    • UNESCO Missing - Chybi [Známka 2863] [Stamp 2863]
    • (100th Birth Anniversary - UNESCO Missing - Chybi ) [Známka 2870] [Stamp 2870]
    • UNESCO Missing - Chybi [Známka 2883] [Stamp 2883]
    • UNESCO Missing - Chybi 1990 [Kupon 2921] [Coupon 2921]
    • UNESCO Missing - Chybi [Známka 2922] [Stamp 2922]
    • UNESCO Missing - Chybi [Známka 2926] [Stamp 2926]
    • UNESCO Missing - Chybi [Známka 2927] [Stamp 2927]
    • UNESCO Missing - Chybi - 100th Birth Anniversary [Známka 2961] [Stamp 2961]
    • UNESCO Missing - Chybi [Známka 3002] [Stamp 3002]
    • UNESCO Missing - Chybi [Známka 7] [Stamp 7]
    • UNESCO Missing - Chybi [Známka 14] [Stamp 14]
    • UNESCO Missing - Chybi [Známka 18] [Stamp 18]
    • UNESCO Missing - Chybi [Známka 32] [Stamp 32]
    • UNESCO Missing - Chybi [Známka 33] [Stamp 33]
    • UNESCO Missing - Chybi [Známka 39] [Stamp 39]
    • UNESCO Missing - Chybi [Známka 66] [Stamp 66]
    • UNESCO Missing - Chybi [Známka 119] [Stamp 119]
    • 1946 UNESCO Missing - Chybi 1996 [Přepážkovy list 119] [Minisheet 119]
    • UNESCO Missing - Chybi [Aršik 141] [Souvenir Sheet 141]
    • UNESCO Missing - Chybi [Známka 174] [Stamp 174]
    • UNESCO Missing - Chybi [Známka 186] [Stamp 186]
    • UNESCO Missing - Chybi [Známka 193] [Stamp 193]
    • UNESCO Missing - Chybi [Známka 194] [Stamp 194]
    • UNESCO Missing - Chybi [Známka 226] [Stamp 226]
    • UNESCO Missing - Chybi [Známka 247] [Stamp 247]
    • UNESCO Missing - Chybi [Známka 304] [Stamp 304]
    • UNESCO Missing - Chybi [Známka 305] [Stamp 305]
    • UNESCO Missing - Chybi [Známka 333] [Stamp 333]
    • UNESCO Missing - Chybi [Známka 334] [Stamp 334]
    • UNESCO Missing - Chybi [Známka 429] [Stamp 429]
    • UNESCO Missing - Chybi [Známka 430] [Stamp 430]
    • UNESCO Missing - Chybi Biosphere Reserve [Aršik 525] [Souvenir Sheet 525]
    • UNESCO Missing - Chybi Biosphere Reserve [Aršik 563] [Souvenir Sheet 563]
    • UNESCO Missing - Chybi Biosphere Reserve [Aršik 604] [Souvenir Sheet 604]
    • Lower Moravian UNESCO Missing - Chybi Biosphere Preserve [Aršik 645] [Souvenir Sheet 645]
    • UNESCO Missing - Chybi Biosphere Reserve [Aršik 691] [Souvenir Sheet 691]
    • UNESCO Missing - Chybi - 70 years [Známka 909] [Stamp 909]
  • UNICEF
    • UNICEF Missing - Chybi 1946-1971 [Známka 1927] [Stamp 1927]
    • UNICEF Missing - Chybi 1946-1971 [Známka 1928] [Stamp 1928]
    • UNICEF Missing - Chybi 1946-1971 [Známka 1929] [Stamp 1929]
    • UNICEF Missing - Chybi 1946-1971 [Známka 1930] [Stamp 1930]
    • UNICEF Missing - Chybi 1946-1971 [Známka 1931] [Stamp 1931]
    • UNICEF Missing - Chybi 1946-1971 [Známka 1932] [Stamp 1932]
    • UNICEF Missing - Chybi 1946-1996 [Známka 121] [Stamp 121]
  • UPU
    • UPU Missing - Chybi 1874 1949 [Známka 508] [Stamp 508]
    • UPU Missing - Chybi 1874 1949 [Známka 509] [Stamp 509]
    • UPU Missing - Chybi 1874 1949 [Známka 510] [Stamp 510]
  • USA
    • Meteorological Cooperation between the USSR and USA Missing - Chybi [Známka 1427] [Stamp 1427]
    • Derringer, USA Missing - Chybi , circa 1865 [Známka 1749] [Stamp 1749]
    • USSR - USA Missing - Chybi [Známka 2164] [Stamp 2164]
    • Susan Jeffers - USA Missing - Chybi [Aršik 2600] [Souvenir Sheet 2600]
    • Erick Ingraham ( USA Missing - Chybi ) [Známka 2712] [Stamp 2712]
    • World Championship Soccer USA Missing - Chybi 1994 [Známka 45] [Stamp 45]
  • USSR
    • USSR Missing - Chybi [Známka 1069] [Stamp 1069]
    • USSR Missing - Chybi Wins in Space 4-12-1961 [Známka 1178] [Stamp 1178]
    • 40th Anniversary of the USSR Missing - Chybi [Známka 1272] [Stamp 1272]
    • 40 Years of the USSR Missing - Chybi [Známka 1273] [Stamp 1273]
    • 20th Anniversary of the Friendship and Mutual Assistance Treaty between Czechsoslovakia and the USSR Missing - Chybi 1943-1963 [Známka 1344] [Stamp 1344]
    • 20th Anniversary of the Friendship and Mutual Assistance Treaty between Czechsoslovakia and the USSR Missing - Chybi 1943-1963 [Známka 1345] [Stamp 1345]
    • Meteorological Cooperation between the USSR Missing - Chybi and USA [Známka 1427] [Stamp 1427]
    • 1st Czechoskovak Battalion in the USSR Missing - Chybi [Známka 1945] [Stamp 1945]
    • 50th Anniversary of the USSR Missing - Chybi 1922-1972 [Známka 1992] [Stamp 1992]
    • Czechoslovakia - USSR Missing - Chybi [Známka 2138] [Stamp 2138]
    • USSR Missing - Chybi - Czechoslovakia - DDR [Známka 2160] [Stamp 2160]
    • USSR Missing - Chybi - France [Známka 2161] [Stamp 2161]
    • USSR Missing - Chybi - India [Známka 2162] [Stamp 2162]
    • USSR Missing - Chybi - Poland [Známka 2163] [Stamp 2163]
    • USSR Missing - Chybi - USA [Známka 2164] [Stamp 2164]
    • Salyut - USSR Missing - Chybi [Známka 2280] [Stamp 2280]
    • 55th Anniversary of the USSR Missing - Chybi 1922-1917 [Známka 2282] [Stamp 2282]
    • Joint USSR Missing - Chybi -Czechoslovak Flight [Známka 2296] [Stamp 2296]
    • Joint USSR Missing - Chybi -Czechoslovak Flight [Známka 2297] [Stamp 2297]
    • Joint Czechoslovak- USSR Missing - Chybi Flight [Známka 2362] [Stamp 2362]
    • 50th Anniversary of the USSR Missing - Chybi 1922-1982 [Známka 2562] [Stamp 2562]
    • 5th Anniversary of the Joint USSR Missing - Chybi -Czechoslovak Flight 1978-1983 [Známka 2586] [Stamp 2586]
    • Joint USSR Missing - Chybi -Czechoslovak Flight [Známka 2586] [Stamp 2586]
  • Uher
    • Milos Uher Missing - Chybi [Známka 2072] [Stamp 2072]
  • Uherske
    • Uherske Missing - Chybi Hradiste 1257-1957 [Známka 923] [Stamp 923]
    • Uherske Missing - Chybi Hradiste [Známka 1789] [Stamp 1789]
  • Uhersky
    • Uhersky Missing - Chybi Brod [Známka 1889] [Stamp 1889]
  • Ukraine
    • Carpatho- Ukraine Missing - Chybi [Známka 351] [Stamp 351]
    • Carpatho- Ukraine Missing - Chybi [Známka 351 2. vydání] [Stamp 351 2nd Issue]
    • Carpatho- Ukraine Missing - Chybi [Známka N351] [Stamp N351]
    • Carpatho- Ukraine Missing - Chybi [Známka N351] [Stamp N351]
  • Ukrainian
    • [ Ukrainian Missing - Chybi Philatelic and Numismayic Society. Glenspey, New York] [Známka N351] [Stamp N351]
    • [ Ukrainian Missing - Chybi Philatelic and Numismayic Society. Glenspey, New York] [Známka N351] [Stamp N351]
  • Ukrainpex
    • [Label. Ukrainpex Missing - Chybi 1984. Roman J. Mudry] [Známka N351] [Stamp N351]
    • [Label. Ukrainpex Missing - Chybi 1984. Roman J. Mudry] [Známka N351] [Stamp N351]
  • Ulf
    • Ulf Missing - Chybi Lofgren [Sweden] [Známka 2269] [Stamp 2269]
  • Under
    • Socialism Built Under Missing - Chybi the Leadership of the Czechoslovak Communist Party [Známka 994] [Stamp 994]
    • Under Missing - Chybi Socialism for Peace [Známka 1115] [Stamp 1115]
  • Underwing
  • Union
    • 2nd Trade Union Missing - Chybi Congress 1949 [Známka 525] [Stamp 525]
    • 2nd Trade Union Missing - Chybi Congress 1949 [Známka 526] [Stamp 526]
    • With the Soviet Union Missing - Chybi for Peace and Socialism [Známka 569] [Stamp 569]
    • With the Soviet Union Missing - Chybi for Peace and Socialism [Známka 570] [Stamp 570]
    • With the Soviet Union Missing - Chybi Forever [Známka 590] [Stamp 590]
    • Building Socialism in our Country with the Soviet Union Missing - Chybi [Známka 802] [Stamp 802]
    • Building Socialism in our Country with the Soviet Union Missing - Chybi [Známka 803] [Stamp 803]
    • Building Socialism in our Country with the Soviet Union Missing - Chybi [Známka 804] [Stamp 804]
    • 3rd World Trade Union Missing - Chybi Congress [Známka 827] [Stamp 827]
    • 3rd World Trade Union Missing - Chybi Congress [Známka 828] [Stamp 828]
    • 4th World Trade Union Missing - Chybi Congress, October 1957 Leipzig [Známka 960] [Stamp 960]
    • 1st World Trade Union Missing - Chybi Conference of Working Youth, Prague 1958 [Známka 997] [Stamp 997]
    • 4th Trade Union Missing - Chybi Congress, Prague May 1959 [Známka 1054] [Stamp 1054]
    • 4th Trade Union Missing - Chybi Congress 1959 [Známka 1055] [Stamp 1055]
    • 5th World Trade Union Missing - Chybi Congress Moscow 12-1-1961 12-16-1961 [Známka 1226] [Stamp 1226]
    • 100th Anniversary of the Union Missing - Chybi of Czechoslovak Mathematics and Physics [Známka 1236] [Stamp 1236]
    • 100th Anniversary of the Union Missing - Chybi of Czechoslovak Mathematics and Physics [Známka 1239] [Stamp 1239]
    • 5th Trade Union Missing - Chybi Congress - Prague [Známka 1293] [Stamp 1293]
    • 4th Czechoslovak Youth Union Missing - Chybi Congress, Prague 1963 [Známka 1301] [Stamp 1301]
    • 20 Years of the World Trade Union Missing - Chybi Federation [Známka 1457] [Stamp 1457]
    • ITU International Telecomunication Union Missing - Chybi 1865-1965 [Známka 1465] [Stamp 1465]
    • 5th Congress of the Czechosloval Youth Union Missing - Chybi [Známka 1580] [Stamp 1580]
    • 6th Trade Union Missing - Chybi Congress, Prague [Známka 1581] [Stamp 1581]
    • 9th Congress of the International Union Missing - Chybi of Architects [Známka 1622] [Stamp 1622]
    • 16th Universal postal Union Missing - Chybi Congress, Tokyo 1969 [Známka 1791] [Stamp 1791]
    • Socialist Youth Union Missing - Chybi [Známka 1852] [Stamp 1852]
    • Federations of Workers' Union Missing - Chybi Physical Exercise 1921-1971 [Známka 1910] [Stamp 1910]
    • 3th World Trade Union Missing - Chybi Congress 1972 [Známka 1963] [Stamp 1963]
    • 8th World Trade Union Missing - Chybi Congress, Varna 1973 [Známka 2053] [Stamp 2053]
    • Universal Postal Union Missing - Chybi , 1874-1974 [Známka 2104] [Stamp 2104]
    • Universal Postal Union Missing - Chybi , 1874-1974 [Známka 2105] [Stamp 2105]
    • Universal Postal Union Missing - Chybi , 1874-1974 [Známka 2106] [Stamp 2106]
    • Universal Postal Union Missing - Chybi , 1874-1974 [Známka 2107] [Stamp 2107]
    • Universal Postal Union Missing - Chybi , 1874-1974 [Známka 2108] [Stamp 2108]
    • Universal Postal Union Missing - Chybi , 1874-1974 [Známka 2109] [Stamp 2109]
    • All Trade Union Missing - Chybi Congress, Prague 1977 [Známka 2250] [Stamp 2250]
    • 9th World Trade Union Missing - Chybi Congress, Prague 1978 [Známka 2304] [Stamp 2304]
    • Socialist Youth Union Missing - Chybi 1970-1980 [Známka 2459] [Stamp 2459]
    • 10th World Trade Union Missing - Chybi Congress, Havana 1982 [Známka 2524] [Stamp 2524]
    • 60th Anniversary International Raiway Union Missing - Chybi [Známka 2530] [Stamp 2530]
    • Universal Postal Union Missing - Chybi 1874-1984 [Známka 2652] [Stamp 2652]
    • Universal Postal Union Missing - Chybi 1874-1984 [Aršik 2652] [Souvenir Sheet 2652]
    • Universal Postal Union Missing - Chybi 1874-1984 [Známka 2653] [Stamp 2653]
    • Universal Postal Union Missing - Chybi 1874-1984 [Aršik 2653] [Souvenir Sheet 2653]
    • World Trade Union Missing - Chybi Federation 1945-1985 [Známka 2706] [Stamp 2706]
    • 50th Anniversary of the Establishment of the Bowling Union Missing - Chybi in Czechoslovakia 1987 [Známka 2779] [Stamp 2779]
    • Revolutionary Trade Union Missing - Chybi Movement [Známka 2790] [Stamp 2790]
    • 11th Pan Union Missing - Chybi Congress [Známka 2790] [Stamp 2790]
    • 125 Years of The Czechoslovak Mathematicians and Physicists Union Missing - Chybi [Známka 2801] [Stamp 2801]
    • 125 Years of The Czechoslovak Mathematicians and Physicists Union Missing - Chybi [Známka 2802] [Stamp 2802]
    • 125 Years of The Czechoslovak Mathematicians and Physicists Union Missing - Chybi [Známka 2803] [Stamp 2803]
    • OSS: Thirty Years of the Socialist Communications Union Missing - Chybi [Známka 2810] [Stamp 2810]
    • Soviet Union Missing - Chybi 1922-1987 [Známka 2816] [Stamp 2816]
    • Universal Postal Union Missing - Chybi 1874-1994 [Známka 48] [Stamp 48]
    • Association of the Czech Republic with the European Union Missing - Chybi [Známka 63] [Stamp 63]
    • Universal Postal Union Missing - Chybi 1874-1999 [Známka 225] [Stamp 225]
    • European Union Missing - Chybi Membership [Známka 394] [Stamp 394]
    • Czech European Union Missing - Chybi Presidency [Známka 584] [Stamp 584]
    • General Assembly of the Union Missing - Chybi of Czech Philatelists, Prague December 4, 2010 [Kupon 643] [Coupon 643]
    • 150th Anniversary of the Foundation of the Union Missing - Chybi of Czech Mathematicians and Physicists [Známka 714] [Stamp 714]
  • Unispace
    • Unispace Missing - Chybi 82 Vienna [Známka 2544] [Stamp 2544]
    • Unispace Missing - Chybi 82 [Aršik 2544] [Souvenir Sheet 2544]
  • Unite
    • Workers of the World, Unite Missing - Chybi ! [Známka 592] [Stamp 592]
    • Workers of all Countries Unite Missing - Chybi [Známka 651] [Stamp 651]
    • Workers of all Countries Unite Missing - Chybi [Známka 652] [Stamp 652]
    • Workers of the World, Unite Missing - Chybi ! [Známka 723] [Stamp 723]
  • United
    • Be even more Harmonious, United Missing - Chybi , and Decisive, and your Will, the Will of the People, will be The Law of this Country. [Aršik 492] [Souvenir Sheet 492]
    • United Missing - Chybi Healthcare Supports Building Socialism [Známka 670] [Stamp 670]
    • United Missing - Chybi Healthcare Improves the Next Generation [Známka 671] [Stamp 671]
    • United Missing - Chybi Healthcare Supports Building Socialism [Známka 672] [Stamp 672]
    • Sports United Missing - Chybi for Socialism [Známka 674] [Stamp 674]
    • United Missing - Chybi Nations [Známka 2126] [Stamp 2126]
    • United Missing - Chybi Nations World Health Organization [Přepážkovy list 2215] [Minisheet 2215]
    • 30 Years of the United Missing - Chybi Peasant's Cooperatives [Známka 2358] [Stamp 2358]
    • 1945-1980 - 35th Anniversary of the Founding of the United Missing - Chybi Nations [Známka 2442] [Stamp 2442]
    • United Missing - Chybi Nations [Známka 2541] [Stamp 2541]
    • United Missing - Chybi Nations 1945-1985 [Známka 2689] [Stamp 2689]
    • United Missing - Chybi Nations 1945-1985 [Aršik 2689] [Souvenir Sheet 2689]
    • Helsinki Europe as a United Missing - Chybi House 1975-1990 [Známka 2945] [Stamp 2945]
    • United Missing - Chybi Nations 1945-1995 [Známka 95] [Stamp 95]
    • United Missing - Chybi Europe [Přepážkovy list 395] [Minisheet 395]
    • The United Missing - Chybi Nations Educational, Scientific and Cultural Organization [Známka 909] [Stamp 909]
  • Universal
    • 16th Universal Missing - Chybi postal Union Congress, Tokyo 1969 [Známka 1791] [Stamp 1791]
    • Universal Missing - Chybi Postal Union, 1874-1974 [Známka 2104] [Stamp 2104]
    • Universal Missing - Chybi Postal Union, 1874-1974 [Známka 2105] [Stamp 2105]
    • Universal Missing - Chybi Postal Union, 1874-1974 [Známka 2106] [Stamp 2106]
    • Universal Missing - Chybi Postal Union, 1874-1974 [Známka 2107] [Stamp 2107]
    • Universal Missing - Chybi Postal Union, 1874-1974 [Známka 2108] [Stamp 2108]
    • Universal Missing - Chybi Postal Union, 1874-1974 [Známka 2109] [Stamp 2109]
    • Universal Missing - Chybi Postal Union 1874-1984 [Známka 2652] [Stamp 2652]
    • Universal Missing - Chybi Postal Union 1874-1984 [Aršik 2652] [Souvenir Sheet 2652]
    • 19th Universal Missing - Chybi Postal Congress, Hamburg 1984 [Aršik 2653] [Souvenir Sheet 2653]
    • Universal Missing - Chybi Postal Union 1874-1984 [Známka 2653] [Stamp 2653]
    • Universal Missing - Chybi Postal Union 1874-1984 [Aršik 2653] [Souvenir Sheet 2653]
    • Universal Missing - Chybi Postal Union 1874-1994 [Známka 48] [Stamp 48]
    • Universal Missing - Chybi Postal Union 1874-1999 [Známka 225] [Stamp 225]
  • Universiad
    • Czechoslovak 1964 Universiad Missing - Chybi [Známka 1356] [Stamp 1356]
    • Czechoslovak 1964 Universiad Missing - Chybi [Známka 1357] [Stamp 1357]
    • Czechoslovak Universiad Missing - Chybi Brno 1965 [Známka 1413] [Stamp 1413]
  • University
    • Charles University Missing - Chybi 1348 [Známka 470] [Stamp 470]
    • Charles University Missing - Chybi 1348 [Známka 471] [Stamp 471]
    • Charles University Missing - Chybi 1348 [Známka 472] [Stamp 472]
    • Charles University Missing - Chybi 1348 [Známka 473] [Stamp 473]
    • Lomonsov University Missing - Chybi , Moscow [Známka 755] [Stamp 755]
    • 35th Anniversary of Comenius University Missing - Chybi [Známka 816] [Stamp 816]
    • Comenius University Missing - Chybi , Bratislava, founded 1919 [Známka 817] [Stamp 817]
    • 35th Anniversary of Comenius University Missing - Chybi [Známka 817] [Stamp 817]
    • Bratislava University Missing - Chybi 1465-1965 [Známka 1470] [Stamp 1470]
    • Brno University Missing - Chybi 1919-1969 [Známka 1750] [Stamp 1750]
    • Komensky University Missing - Chybi , Bratislava 1919-1969 [Známka 1751] [Stamp 1751]
    • Olmouc University Missing - Chybi [Známka 2035] [Stamp 2035]
    • O. Speniel: Charles University Missing - Chybi (1948) [Známka 2300] [Stamp 2300]
    • Bratislava Technical University Missing - Chybi - 40 Years [Známka 2372] [Stamp 2372]
    • Prague University Missing - Chybi of Applied Arts [Známka 2683] [Stamp 2683]
    • Trnava University Missing - Chybi 1635 [Známka 2684] [Stamp 2684]
    • Charles University Missing - Chybi , Prague [Známka 2849] [Stamp 2849]
    • University Missing - Chybi Hospital, Motol - Prague [Známka 2855] [Stamp 2855]
    • Charles University Missing - Chybi [Známka 174] [Stamp 174]
    • Charles University Missing - Chybi , Prague [Známka 453] [Stamp 453]
    • Czech Technical University Missing - Chybi , Prague 1707-2007 [Známka 501] [Stamp 501]
  • Unmanned
    • Soviet Unmanned Missing - Chybi Interplanetary Station 10-4-1959 [Známka 1169] [Stamp 1169]
    • Unmanned Missing - Chybi Multistage Rocket [Známka 1244] [Stamp 1244]
    • Unmanned Missing - Chybi Station on the Moon [Známka 1245] [Stamp 1245]
  • Unor
    • Unor Missing - Chybi 1948-1949 [Kupon 501] [Coupon 501]
  • Uprising
    • Anniversary of the Slovak National Uprising Missing - Chybi [Aršik 408] [Souvenir Sheet 408]
    • 10th Anniversy of the Slovak National Uprising Missing - Chybi August 29, 1944 - 1954 [Známka 796] [Stamp 796]
    • 10th Anniversy of the Slovak National Uprising Missing - Chybi August 29, 1944 - 1954 [Známka 797] [Stamp 797]
    • 15th Anniversary of the Slovak National Uprising Missing - Chybi 8-29-1944 1959 [Známka 1067] [Stamp 1067]
    • 15th Anniversary of the Slovak National Uprising Missing - Chybi 8-29-1944 1959 [Známka 1068] [Stamp 1068]
    • 120th Anniversary of the Slovak Uprising Missing - Chybi 1848 [Známka 1705] [Stamp 1705]
    • Slovak National Uprising Missing - Chybi 1944-1969 [Známka 1778] [Stamp 1778]
    • 25th Annibersary of the Prague Uprising Missing - Chybi [Známka 1829] [Stamp 1829]
    • Slovak National Uprising Missing - Chybi 1944-1974 [Známka 2093] [Stamp 2093]
    • May Uprising Missing - Chybi of the Czech people 1945-1975 [Známka 2136] [Stamp 2136]
    • Slovak National Uprising Missing - Chybi 1944-1979 [Známka 2387] [Stamp 2387]
    • 35th Anniversary of the Czech People's May Uprising Missing - Chybi [Známka 2438] [Stamp 2438]
    • Slovak National Uprising Missing - Chybi 1944-1984 [Známka 2661] [Stamp 2661]
    • May Uprising Missing - Chybi of the Czech People, 1945-1985 [Známka 2695] [Stamp 2695]
    • Slovak National Uprising Missing - Chybi 1944-1989 [Známka 2902] [Stamp 2902]
  • Uprka
    • Joza Uprka Missing - Chybi 1861-1940 [Známka 1173] [Stamp 1173]
    • Joza Uprka Missing - Chybi (1861-1940) [Známka 705] [Stamp 705]
    • Joza Uprka Missing - Chybi Gallery [Známka 705] [Stamp 705]
  • Ural
    • Ural Missing - Chybi Owl [Kupon 817] [Coupon 817]
    • Ural Missing - Chybi Owl [Aršik 853] [Souvenir Sheet 853]
  • Uran
    • Uran Missing - Chybi Worker's Resort (High Tatras) [Známka 2491] [Stamp 2491]
  • Urn
    • Urn Missing - Chybi Plant [Známka 2446] [Stamp 2446]
  • Urx
    • Eduard Urx Missing - Chybi 1903-1942 [Známka 1295] [Stamp 1295]
    • Eduard Urx Missing - Chybi [Známka 2019] [Stamp 2019]
  • Usak
    • Kasim Usak Missing - Chybi Carpet [Známka 628] [Stamp 628]
  • Use
    • Cupon for Your Use Missing - Chybi [Kupon 354] [Coupon 354]
  • Uses
    • 2nd UN Conference on the Exploration and Peaceful Uses Missing - Chybi of Outer Space [Aršik 2544] [Souvenir Sheet 2544]
  • Usti
    • Usti Missing - Chybi nad Labem [Známka 1717] [Stamp 1717]
    • Usti Missing - Chybi nad Labem [Známka 13] [Stamp 13]
    • Usti Missing - Chybi nad Labem [Známkové sešitky 13] [Booklet 13]
    • Usti Missing - Chybi nad Labem [Známka 656] [Stamp 656]
  • Utagawa
    • Utagawa Missing - Chybi Kunisada (1786-1865) [Známka 503] [Stamp 503]
  • Utamaro
    • Utamaro Missing - Chybi 1753-1806 [Známka 2998] [Stamp 2998]