Notes: Scarce and desirable model Rolex stainless steel “Bombe ref 5018 serial # 641,xxx circa 1948. Featuring 35mm diameter case with extended bowed lugs, smooth bezel, acrylic crystal, and very pleasing older refinished antique white dial with raised triangular indexes with aged luminous dots and elongated tapered silver dauphine hands. Powered by early calibre 630 self winding “bubble back” type movement with sweep seconds. With correct bubble back era crown.

Mechanism: Th 630 was Rolex's second automatic mechanism. It was an evolution of the 620. It is a self-winding movement with unidirectional winding rotor, 18,000 A/h, 17 jewels, small seconds, shock protection. Escapement: Stone lever, Yoke winding system. Sweep second. first automatic with rotor winding. Breguet hairspring. This is the chronometer version of the movement.

Family Notes: In 1926, Hans Wilsdorf introduced the Oyster watch which used a waterproof case, hence the name. He added "Perpetual" to the name when in 1933 he introduced a reliable automatic self-winding watch. Hence the name means "Waterproof, Self-Winding" in Rolex-speak and generally means the watch is water resistant to a depth of 100 meters.