Longines 6B/159 RAF Military Watch Black Dial 1956 Air Ministry Cal 12.68N
Longines 6B/159 RAF Air Ministry Wristwatch – 1956. Longines 6B/159. Original black M.O.D. Longines dial. Issued in 1956 to the larger 6B/159 specification, introduced by the Air Ministry to improve legibility.