1940s steel vintage Rolex Oyster ‘Bubbleback’ watch (3879)
A steel vintage Rolex Oyster ‘Bubbleback’ Perpetual watch, dated 1945. The case measures 32mm, excluding Rolex Oyster winding crown. The case is signed Rolex , Geneva-Suisse, Patented with reference 5050 and numbered. The calibre 630 automatic movement is signed Rolex Perpetual Chronometer, Swiss Made, Super Balance with 17 jewels. The dial has Arabic numerals at the quarters, with fine blued steel hands and gilt centre sweep seconds hand. The dial is signed Rolex Oyster Perpetual Chronometer above the centre and Officially Certified Chronometre below.
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.