This 1976 Commercial Aviation 13¢ First Day Cover features the U.S. stamp issued March 19, 1976, in Chicago, Illinois, marking the 50th anniversary of commercial aviation (1926-1976). The cachet displays a striking globe encircled by envelopes with the bold "FIRST DAY COVER" legend.
The stamp commemorates half a century of scheduled airmail and passenger service that began with the Ford Trimotor and other early biplanes shown on the design. Chicago's selection as the first-day city reflects its historic role as a major aviation and mail hub.
A notable detail is the dual biplane illustration highlighting both single- and twin-engine mail planes used in the pioneering years of commercial flight. The cover bears the standard "FIRST DAY OF ISSUE" handstamp and remains in clean, collectible condition.
A fine addition for collectors of aviation topicals, transportation themes, or U.S. postal history from the 1970s.
