A diver's stainless steel automatic Seamaster Professional calendar wristwatch, 1970's,

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A diver's stainless steel automatic Seamaster Professional calendar wristwatch, 1970's,
blue dial with luminous baton markers, date aperture, large luminous orange minute hand, sweep centre seconds, self-winding movement, large waterproof case with calibrated black bezel, red bezel release button, protected screw down winding crown, stainless steel Omega bracelet, diameter of bezel 43mm.