LONGINES.A VERY RARE MEN'S BRASS MANUAL MILITARY WRISTWATCH Model: Heritage Military C.O.S.DDate: Circa 1940'sMovement: Signed, 16-Jewels, Cal. 12.68N, No. 6'896'351Dial: Signed, white, military arrow at the 12 o'clock position, black Arabic numerals, red inner 24h Arabic numerals, black outer minute division, blued sword hands with luminous insert, blued centre seconds hand with luminous insertCase: Signed, brass screw down back, engraved "C.O.S.D. 2340" (C.O.S.D stands for Combined Operations Stores Depot)Strap: Generic khaki Nato styleSize: 35.6mmOne of the rare military Longines intended for the solo use of the Combine Operation Command created by the British War Office during the Second World War.