This stamp has been designated as Scott Number C42. The UPU's headquarters continue to be located in Bern, Switzerland.
C44 - 1949 25c Plane & Globe - Mystic Stamp Company
Ten Universal Postal Union Airmail US Postage Stamps - No. C42
Airmails
C66 - 1963 15c 1st Internl Post Conf - Mystic Stamp Company
Universal Postal Union Issue, Post Office Dept Building, 10c Violet., Plate # Blocks of 4 Maximum Quantity Issued: 421 220. 2021 Scott CV = $0.25, SMQ
US #C42 XF NH Mint OG, LR Plate #24155 Single. Fresh Color. 10384 | United States, Air Mail Stamp
This is a numbered plate block of 4 stamps as pictured. (plate number may vary from stock picture) The New Post Office Bldg. built in 1934 in
#C42 - 1949 10c Post Office Postage Stamps Plate Block (4)
3332 - 1999 45c Universal Postal Union - Mystic Stamp Company
Las mejores ofertas en Violeta de aviación 10 cent denominación
C42-44 - 1949 Universal Postal Union 3V - Mystic Stamp Company