1976 Barnes Wallis CBE Commemorative Cover, 40th Anniversary of First Flight of the Wellington British Forces 1532 Postal Service, Signed by Barnes Wallis Inventor of the Bouncing Bomb

15th June 1976, Barnes Wallis CBE commemorative Cover, 40th Anniversary of First Flight of the Wellington British Forces 1532 Postal Service. Signed by Barnes Wallis Inventor of the Bouncing Bomb, that breached MÖHE & EDER Dams flown by Wellington Bombers. Very Scarce and sought after signed cover. Pristine condition, complete with informative insert card & early Photo of Sir Barnes Wallis.