Bidspirit auction | 13 - NASA & Air

13 - NASA & Air Force Experimental Flight Covers & Lithograph - Thirteen event covers with some signed by Test Pilots from the SR-71, YP-71, XB-70, YF-23, B-2 Stealth Bomber, B1-B and others. These covers show a glimpse of the military's experimental aircrafts. All are in very good condition with signatures from famed Test Pilots Don Mallick, Fitz Fulton, Vic Horton and Robert Gilland. Condition: #1001