First Flying Post Office, First Day of Issue Cover TWA
U414a, Size 13 (UPSS 1916-78-17), VF, Chicago
U429f, Size 10 (UPSS 2262-57-27), Fine, sm te
Union Steam Ship Co., Philadelphia, PA Dec 10
UNIVERSITY PLACE, NEBR. MAR 17/1914 machine f
Unused Advert PPC w/ Blue-Green illust of New
Unused Advert PPC w/ illust of Horticultural
UO36, Dudley, MA Nov/29/80 WORCESTER/COUNTY P
UX12 unused postal card, VF
Van Ormer, Pa Jan/5/1911 Purple cnl ties #375
Warwick Auto Co., Warwick, NY Jun/12/19 machi
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U35, Type 14 Entire, Rock Island, IL CDS, (UP
U414c, Size (UPSS 1927-41-15), VF, Atameda,
U458, Size 13 (UPSS 2868-78-19), VF, slight a
United States & Canada Express, Claremont, NH
Unused Advert PPC w/ Blue Green illust of Man
Unused Advert PPC w/ Browntone illust of U.S.
Unused Advert PPC w/ illust of Machinery & Tr
Utica, KY 1929 pmks tie #U411 Cut Out, not ac
UX4, Ancon, CZ Jan/30/15 machine cnl on Posta
Village Green Rural Sta., Media, Pa Dec/31/19
Washington D.C., Washington, DC Jun 27/1917 m
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U413c, Size 10 (UPSS 1876-57-17), Fine, cr, K
U414e, Size 13 (UPSS 1945-79-19), Fine, sm fl
U468d, Double Surcharge-Type 4 VF, couple edg
University of Virginia, VA Jul/22 CDS w/ 22 c
Unused Advert PPC w/ Blue Green illust of Tem
Unused Advert PPC w/ illust of Electric Tower
Unused Advert PPC w/ illust of Manufacturers
PA PHILA STATION C #65 BULLSEYE 2/18/68
UX9, Boston, MA Aug/25/92 American #48 Machin
VIRGA & TENN, R.R. 8/Dec Blue CDS on ca. 1854
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U413c, Size 13 (UPSS 1877-78-15), VF, Morrist
U429a, Size 13 (UPSS 2244-81-19), VF, Shelbur
Union Mills NY /Nov 20/50 ms pmk on 1850 env,
PA PHILA STATION C #65 BULLSEYE 2/18/68
Unused Advert PPC w/ Blue-Green illust of Mac
Unused Advert PPC w/ illust of Fountain of Na
Unused Advert PPC w/ illust of Temple of Musi
UX1, Culebra, CZ Apr/9/07 duplex cnls on Post
Valve, Troy, NY May/28/96 duplex cnl on #U311
Wallpaper, New York, NY Jan 30, 1903 machine
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