Rolex Oyster Perpetual 3370

The Rolex Oyster Perpetual ref. 3370 is a very early automatic wristwatch produced in the mid-1930s, representing one of the foundational models that helped shape Rolex’s future in waterproof, self-winding horology. This reference features a 30mm case crafted in stainless steel or gold, complete with the screw-down crown and screw-down caseback that define the Oyster case, and a domed acrylic crystal enhancing water and dust resistance. The movement was an early self-winding design, most likely a primitive rotor or bumper system, offering a power reserve of around 36 hours. The dial typically displayed small seconds at 6 o’clock, radium-filled hands, and applied numerals or indices on a silver or cream-toned background—stylistically consistent with mid-1930s Rolex design language. It carries a lug-to-lug measurement of approximately 36mm and a lug width of 16mm, creating a compact, dress-oriented wrist profile. The 3370 is significant as one of the earliest true Oyster Perpetuals, serving as a stepping stone in Rolex’s journey to perfecting self-winding waterproof watches. Its rarity and historical relevance make it a prized piece for serious vintage Rolex collectors focused on pre-WWII developments and transitional technology.