Vintage Post Card with 2 cents Washington unique stamp dated postmark Dec. 1905

In Milwaukee by E.C. Knopp no. 908.

The Postal History of ICAO

VG/F (Very Good/Fine) US Back of Book Stamps for sale

Handstamped 2 Cent US Back of Book Postal Cards & Stationery for sale

ANTIQUE STAMPS POSTCARDS - 使用済切手

Las mejores ofertas en Carmine tarjetas postales de contraportadas de EE. UU. y Papelería

Postmark Rare Stamp

United States Postal History by H.R. Harmer - Issuu

2 Cent Carmine US Back of Book Stamps for sale

2 Cent Post Card

Daniel F. Kelleher Auctions, LLC Sale - 699 Page 17

Our washington correspondence hi-res stock photography and images - Alamy

1901-1910 Year of Issue US Back of Book Postal Cards & Stationery for sale