Rolex Oyster Perpetual 3627

The Rolex Oyster Perpetual ref. 3627 is a vintage timepiece produced in the mid-to-late 1930s, showcasing Rolex’s dedication to marrying automatic winding systems with the dependable waterproof Oyster case. Its 30mm case, crafted from stainless steel or gold, employed the signature screw-down crown and caseback design that distinguished Rolex’s early waterproof models, along with a domed acrylic crystal. The movement inside was an early self-winding Rolex caliber—either a bumper or rotor-driven mechanism—delivering a 36-hour power reserve and marking an essential step in the evolution of Rolex’s automatic watchmaking. Dial configurations typically included a small seconds register at 6 o’clock, radium-filled hands, and Arabic numerals or baton markers, all executed in a clean, practical style against silver or champagne backgrounds. With a lug-to-lug length of approximately 36mm and a lug width of 16mm, the 3627 adhered to the compact wristwatch standards of the era. Though not produced in large numbers, the 3627 holds importance as part of the pioneering generation of Oyster Perpetual watches, embodying Rolex’s innovative spirit in the years preceding World War II. Collectors value this reference for its understated design and technical relevance during a pivotal moment in Rolex history.