Reference 5513/5517 Submariner ‘Milsub’ | A stainless steel automatic wristwatch, Made for the British Royal Navy, Circa 1973 Dial: matte black Caliber: cal. 1520 automatic, 26 jewels Case: stainless steel, screw down case back, lug stamped 5517 Case number: 3’926’898 Size: 40 mm diameter Signed: case, dial and movement Box: no Papers: no
