An early stainless steel automatic sweep seconds wristwatch with bracelet, Rolex, Oyster Pertpetual, 'Submariner', ref. 5512 circa 1961

nickel lever movement, 26 jewels, mono-metallic balance, adjusted to 5 positions and temperature, black matte dial with triangular, disc and baton hour markers, tonneau water-resistant-type case with dark blue revolving reeded bezel calibrated for 60 minutes, screw-down crown and case back, case, dial and movement signed, with stainless steel Rolex Oyster bracelet and deployant clasp.