1940s steel vintage Rolex Oyster ‘Bubbleback’ watch (3956)
An early stainless steel vintage Rolex Oyster ‘Bubbleback’ Perpetual watch, dated 1945. The case measures 32mm, excluding Rolex Oyster winding crown. The case is signed Brevete, Rolex, Geneve-Suisse, with reference 2940 and numbered between the lugs. The calibre 630 automatic movement is signed Rolex Perpetual Chronometer, Swiss Made, Super Balance with 17 jewels. The rare black dial has white Arabic numerals at the quarters, with luminous blued steel hands and centre sweep seconds hand. The dial is signed Rolex Oyster Perpetual Chronometer above the centre.
The ‘Bubble Back’ was the first completely watertight automatic watch developed by Rolex. It was named the ‘Oyster Perpetual’. The rounded case back was made to house the self-winding movement rather than the original Oyster case. This gave the name the’Bubble Back’. Rolex only produced this watch from 1933 – 1955.