55 selected
- Not filled in
- U.S. Postage
- Uelzen, Stadt
- Uetersen - Stadt
- Uganda - 1966 ND Issue
- Uganda - 1973-1977 ND Issue
- Uganda - 1979 ND Issue
- Uganda - 1982 ND Issue
- Uganda - 1983-1985 ND Issue
- Uganda - 1985-1986 Issue
- Uganda - 1987-1998 Issue
- Uganda - 1991 Issue
- Uganda - 1993-1999 Issue
- Uganda - 1999-2004 Issue
- Uganda - 2003-2009 Issue
- Uganda - 2010-2015 Issue
- Uitgave september 1918
- Uk - Gemeinde
- Ukraïne - 1918 (ND) Emergency Issue
- Ukraine - 1918 (ND) State Treasury Notes
- Ukraïne - 1942 Issue
- Ukraine - 1991 Control Coupon Issue
- Ukraine - 1992 (1996) Regular Issue
- Ukraine - 1992 Coupons Issue
- Ukraine - 1993-96 Coupons Issue
- Ukraine - 1994-2001 Issue
- Ukraine - 2003-2015 Issue
- Ukraine - 2016 Commemorative Issue
- Ukraine - 2022 Fantasy Issue
- Ulsiyn Bank - 1955 \"Sukhe Bataar\" Issue
- Ulster Bank
- Ulster Bank Limited
- Ulster Bank Limited - 2018-2021 \"Living Nature\" Issue
- Umntsholi Wemaswati / Central Bank of Swaziland
- Union Bank of Burma - ND (1958) \"General Aung San\" Issue
- Unione Commercianti di Roma e Provincia
- Unione Commerciati ed Eccercenti della Provincia di Venice
- United Arab Emirates Central Bank
- United Arab Emirates Central Bank - 1997-2007 Issue
- United Arab Emirates Central Bank - 2003-2018 Issue
- United Arab Emirates Central Bank - 2021 \"50th National Day\" Issue
- United Arab Emirates Central Bank - 2022 Issue
- United Arab Emirates Central Bank - ND (1982-1983) \"Latent Numeral on Watermark Area\" Issue
- United Arab Emirates Currency Board - ND (1973-1976) Issue
- United Arab Republic - L. 1940 (1958-1960) With Text Line \"PROVINCE OF EGYPT\" Issue
- United Arab Republic - L. 1940 (1961-1970) Without Text Line \"PROVINCE OF EGYPT\" Issue
- United Kingdom of Libya
- United States Treasury - 03.03.1863 Third Issue
- Unknown
- US Army - ND (1958-1961) \"541\" Series
- USA - 2003 Series
- Usingen
- Uslar-City
- Uy ban Trung u'o'ng
- Uzbekistan - 1992 Issue
- Uzbekistan - 1994-2013 Issue