Vintage 1952 Rolex Oyster Perpetual mechanical automatic semi bubbleback wristwatch. The 34.00mm 14K solid yellow gold case features curved lugs with side gold hallmark stamps, an Oyster Super + Crown winding crown, and a thick dome-profile screw-down coin-edge caseback platter. Inner caseback is stamped GENEVA SWISS R ROLEX PATENTED 14K 0.585 6084. Off-white dial features gold-tone crown applique, 3-6-9 Arabic numeral layout, multi-faceted dagger indices, alpha main hands, a central sweep seconds hand, and is signed ROLEX OYSTER PERPETUAL OFFICIALLY CERTIFIED CHRONOMETER. The mechanical automatic bubbleback chronometer movement is stamped ROLEX PERPETUAL CHRONOMETER SWISS MADE PATENTED, IS TIRETTE TRIGGER SCREW PATENTED, RUBY SELFWINDER JEWELS SWISS, F 36489, and 01057. The timepiece comes mounted on a black crocodile-grain leather strap with a gold-tone tang buckle. Timegrapher testing indicates strong performance running at -3 seconds per day with a 210 degree amplitude and a 2.3ms beat error.This watch is running as of the time of listing, though a professional service is required for accurate timekeeping and extended runtime without service is not guaranteed. This item is sold, as is.