B40c Breaking Record of Return from London to Capetown Signed Cover

E.E. CANBERRA. 30th Anniversary of the breaking of the LONDON to CAPETOWN return record by a Canberra. Cover bearing an 11p Jersey Europa commemorative stamp signed by AVM Bower Gp Capt G.G. Petty Wg Cdr J McD Craig & Wg Cdr R.F.B. Powell. Certified Copy of 1400