Rolex creates the first wristwatch, only in stainless steel, for great depths, the SUBMARINER. Automatic, waterproof up to 100 meters, this watch is equipped with a graduated rotating bezel with 12, 5 minute divisions, where the zero is represented by a triangular index with a fluorescent dot. It has a 37 millimeter diameter, the reference 6204 is indicated both on the case back and between the lugs at 12 o’clock. The dial was produced in several versions, differing one from another both for the wordings and for their lay-out. The winding crown, still without guards which protect it against bumps, has a diameter of only 5.3 millimeters. The references 6205, 6536 and 6536/1 shortly follow, realized only in stainless steel. In these new references the winding crown diameter has passed to 6 mm. All these Submariner watches bear their reference number hallmarked inside the case back. The references 6204 and 6205 had the caliber: 9 3/4” A. 260, created in 1950. The references 6536 and 6536/1 had the caliber: 1030. CALIBER: 1030
Base caliber Ø 28.50 mm
Ht. 5.85 mm
Alt. 18,000
Selfwinding – Center seconds – Shock-absorber – 25 jewels
