Lot
1272 
1959, June 8, First Official Missile Mail, USS Barbero, 4¢ Flag stamp tied by "U.S.S. Barbero (SSG-317), Jun 8, 1959" postmark on cacheted cover (better type I cachet in grayish black and rounded flap envelope), with original official enclosure, Very Fine. Ellington-Zwisler Nos. 25C1. Estimate $500 - 750.