Sinking of the Tirpitz 60th, signed Bob Knight

Sinking of the Tirpitz 60^th anniversary cover. Isle of Man £2 stamp and postmark (12^th November 2004). Flown in a Lancaster cachet. Signed by Flight Lieutenant Bob Knight. He flew his Lancaster bomber of No 617 Squadron on the three major attacks against the Tirpitz that culminated, on November 12^th 1944, in the sinking of the powerful German battleship which had dominated British and American naval strategy in the European theatre.