USA Meter Stamp, Type AR-AIR4.1A

United States · 1948 · 20¢

This is a red meter impression featuring 'US POSTAGE' at the top, 'AIR MAIL' below, and '20¢' as the denomination. A wavy line cancellation pattern is visible on the right.

Meter stamps revolutionized postal payment, allowing businesses to print postage directly. This particular airmail meter stamp reflects the growing importance of air travel for mail delivery in the mid-20th century.