DICK SCOBEE signed NASA Flight Research X-24B Space Cover w/LOA

This is a NASA Flight Research Center X-24B postal cover, postmarked November 19, 1975, at Edwards AFB, California, hand-signed by astronaut Dick Scobee, who later commanded the ill-fated Challenger STS-51-L mission. The cover features a detailed cachet of the X-24B lifting body aircraft and a colorful 10c Apollo-Soyuz stamp, with "Flown on Mother Ship" noted as part of its mission context. The signature has been professionally authenticated by Zarelli Space Authentication and includes a full Letter of Authenticity (LOA #Z008749, dated May 31, 2025).