Scarce 1963 North American X-15 pressure helmet visor, 10.5" x 7.5" x 7.5", with helmet mounting holes to either ear, the inner left of which is stamped as follows: "FAB SER # 808 DEC 5 1963, X 60H 97601, 15%." In fine condition, with scattered toning and tape / adhesive remnants to white plastic guard. In 1963, Joe Engle and Milt Thompson became a part of the X-15 program; that same year, in July and August, pilot Joe Walker exceeded 100 km in altitude, joining NASA astronauts and Soviet cosmonauts as the first human beings to cross that line on their way to outer space.