WORLDWIDE PHILATELY

USA# 3173 

(Firtst Supersonic Flight 50th Anniversary)

Lot of 2 First Day Covers, One Letter Size, the Other Business # 10 Size, but Otherwise Identical.

Commemoration of Brig. General Chuck Yeager's Supersonic Flight in the X-1 Rocket Plane on Ocxtober 14, 1947. Canceled at Edwards Air Force Base, CA on 14 October 1997.

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