ROLEX REF. 5512 4 LINES SUBMARINER STEEL Rolex, "Oyster Perpetual, Submariner, 660ft = 200m, Superlative Chronometer Officially Certified," case No. ---2693 9 (partially illegible), Ref. 5512. Made in 1972. Fine and rare, center seconds, self-winding, water-resistant, stainless steel wristwatch with a stainless steel Rolex Oyster Fliplock bracelet. Three-body, polished and brushed, graduated bi-directional revolving black bezel for the decompression times, Triplock winding- crown protected by the crown guard, screw down case back. Black with luminous round, triangular and baton indexes, outer minutes/ seconds divisions. Luminous steel skeleton hands. Cal. 1570, rhodium-plated, 26 jewels, straight-line lever escapement, monometallic balance adjusted to 5 positions and temperatures, shock absorber, self-compensating Breguet balance spring, Microstella regulating screws, hack mechanism.