Bidspirit auction | 4 - X-24B Signed Cover

4 - X-24B Signed Cover Collection and Lithograph - Four NASA X-24B mission event covers that have been hand signed by Test Pilots Einar Enevoldson, John Manke, Johnny Armstrong and Brigadier General Jake Abrahamson. All are in very good condition with a postcard and vintage lithograph showing the X-24B. Condition: #1001