United States | Airplane Radiator and Propeller 8-Cent United States Air Mail Postage Stamp Issued 1923

Description

This collectible air mail postage stamp issued by the US Post Office depicts an airplane’s radiator and propeller.
Issue Date: August 15, 1923 (At the American Philatelic Society annual convention)
First City: Washington, DC, site of the convention
Category: Airmail
Printed By: Bureau of Engraving and Printing
Printing Method: Flat Plate Printing
Perforations: 11
Mint, never hinged condition.