Rolex 'Oyster Perpetual' Bubbleback wristwatch, circa 1940, the gentleman's 18ct gold and stainless steel automatic wristwatch with black matte dial, Roman numerals and baton indexes, sweep seconds, water resistant type bubbleback case with hooded lugs, flat gold bezel, screw back and screw down Crown, with a Rolex buckle,case, dial and movement signed, reference number 3951, model number 3065, serial number 249766, diameter approximately 31 mm.