ROLEX. A RARE AND EXTREMELY WELL-PRESERVED MEN’S STAINLESS-STEEL MANUAL VINTAGE WRISTWATCH Model: Oyster Date: Circa 1939 Movement: Signed “Rolex Chronometer”, 17-Rubies, Cal. Ultra Prima, timed to 6 positions Dial: Signed, silvered, gilt applied Arabic numerals, black outer minute division, subsidiary dial for seconds at the 6 o’clock position, blued sword hands Case: Signed, “Viceroy” stainless steel, screw down Rolex Oyster crown, signed screw down back signed “Oyster Watch Co. Geneva, Great Britain, Swiss, French, U.S.A and German Patents” and “SAR” stamped inside the screw down back, No. 75772 Strap: Generic Brown leather strap, signed stainless steel Rolex buckle Size: 31mm Rolex made batches of superior watches and having no model number means this is an early prototype or one of a short experimental run. The closest looking is model 24 from 1938, of which few were made, and it might be one of these, looking like a bubbleback but it isn’t (model 25 is the start of the bubbleback).