1941 6¢ Twin-Motor Transport
Twin-Motored Transport Plane Issue
Issue Date: June 25, 1941
City: Washington, DC
Printed By: Bureau of Engraving and Printing
Printing Method: Rotary press printing
Perforations: 11 X 10 ½
A new set of airmail stamps with the twin-motored transport plane design made their appearance beginning in 1941. These stamps were intended to cover the various rates in effect for both domestic and overseas airmail service. The 6¢ issue covered domestic airmail service.