'Double-Red' Sea-Dweller, Ref:1665, Serial No.534****, Circa 1979
26-jewel Cal.1570 rhodium-plated movement adjusted to temperature and 5 positions, straight-line lever escapement, mono-metallic balance, black dial signed in red Sea-Dweller Submariner 2000, luminous round, triangular and baton indexes, luminous Mercedes hands, date aperture at 3, brushed and polished tonneau shaped case with screw down back numbered on the inside, helium escape valve at 9, graduated bi-directional revolving black bezel for decompression times, stainless steel Oyster link bracelet with signed locking clasp, together with service box and card, original diver's log books and Siebe Gorman diving knives, case, dial and movement signed

40mm.