Vintage Air Mail Envelopes

Lot of 2 Air Mail envelope packs. Circa 70s vintage. Made in China. Each pack has 20 envelopes each. 40 envelopes in total for the lot. Envelope measures approx. 4”x6.5”. Pet and smoke free home. Very good vintage condition for its age. New/deadstock in original packaging. Natural storage wear with some wrinkles/bending to packs - see photos. NOTE taping to packaging has yellowed/started to lift in some places.