WW2 RAF issue Pierce pilot's chronograph ref A. Air Ministry issued pilots chronographs are quite rare and only issued for special operations. Watch case size 34 mm without crown. Bezel and 2 hands are missing (center chronograph hand and sub seconds hand).I kept this watch for a long time but decided to sell it due circumstances. Its a unique timepiece so price is high but none on market! This is great investment watch and price for current piece will be double in few years time!