Rolex Oyster Perpetual 3131

The Rolex Oyster Perpetual reference 3131 is a vintage “Bubbleback” model produced in the mid-1940s, with known examples from approximately 1945 to 1947. This reference is a significant piece of horological history, representing a key period when Rolex was solidifying its leadership in producing reliable, self-winding chronometers. The distinctive “Bubbleback” design, with its prominent, convex case back, was a defining feature of the era, engineered to house the early automatic winding rotor. The reference 3131 was offered in premium materials, including 18k yellow gold and stainless steel. Notable variations include models with an engine-turned bezel, adding a touch of sporty elegance. Dials were typically silvered, featuring luminous Arabic or baton hour markers and classic syringe or leaf-style hands. Some examples were fitted with the “Super Oyster” crown, a non-screw-down, yet waterproof, innovation that Rolex experimented with in the post-war period. The combination of its precious metal case, potential for a decorative bezel, and its place in the evolution of the Oyster case make the 3131 a particularly interesting and collectible “Bubbleback” reference.