Rolex Oyster Perpetual Bubbleback 2940 – Automatic / Vintage Collectible One of the most iconic models in Rolex history, the Bubbleback 2940 is one of the brand's first automatic Oyster models. Produced in the early 1940s, this reference stands out for its collectible value and historical significance. The name "Bubbleback" comes from the characteristic domed caseback created by the thick rotor mechanism. Technical Specifications: • Brand / Model: Rolex Oyster Perpetual Bubbleback 2940 • Movement: Automatic (Perpetual Rotor) • Caliber: Rolex Caliber 630 • Case Diameter: 32–33 mm (excluding crown) • Case Material: Stainless steel (Oyster case) • Dial: Original vintage dial, natural patina, radium indices Repainted • Glass: Acrylic • Crown: Original • Case Back: Domed "Bubbleback" design • Bracelet / Strap: Leather strap (new, compatible model) • Condition: Very good for its age, original dial and hand I have been in the retail sector since 2003. I love wearing and selling watches. I offer the highest quality and cleanest watches. After verifying their authenticity, I perform all necessary maintenance. Everyone's happiness makes me happy.