United States 1947 Airplane Over San Francisco Plate Block of Four 25-Cent Air Mail Postage Stamps Mint Never Hinged

This plate block of four 25-cent air mail postage stamps depicting a plane flying over the Oakland Bay Bridge was issued by the US Post Office for use on mail sent to the Pacific and to certain African and Asiatic areas.

Issue Date: July 30, 1947
First City: San Francisco, CA
Printed By: Bureau of Engraving and Printing
Printing Method: Rotary press printing
Perforations: 11 X 10 ½