Bidspirit auction | Rocket Scientist Hermann Oberth signed

Rocket Scientist Hermann Oberth signed space cover - First Day Cover commemorating The First Powered Flight. Fine color cachet of the flight, the Wright Flyer climbs into History. Affixed to this cover are two different Wright Brothers, U.S. Air mail, 31 cent postage stamps. Cancelled Dayton, OH Sep 23, 1978. Fine dated signature: H.Oberth 2/4 85