The Rolex Submariner Reference 5512 is the embodiment of the classic dive watch. The 5512 is simple yet sophisticated and rugged whilst becoming increasingly more uncommon and collectible. Ref 5512 was first introduced in 1958 and ceased production in late 1978. The Rolex reference 5512, like the 5513, is a purpose-built dive watch that lacks the date function. The main difference between the Rolex Submariner ref. 5512 and 5513 is the caliber of the movement. Both references began life with the Rolex cal. 1530 movement, but the 5512 soon adopted the chronometer-certified cal. 1560 movement, and later the cal. 1570 movement. Shortly after its inception, and with the integration of these more advanced movement calibers, the Rolex ref. 5512 adorned the iconic 4-lines of text on the dial in the notation of its chronometer-rated timekeeping capabilities. This is the 5512's only visible differentiator from the ref. 5513 and the most common method collectors use to identify between the references, as the ref. 5513 is classically known for its 2-lines of text. The ref. 5512 is much rarer than the 5513, as it was more expensive to produce and not as popular for its retail price. It said that for every ten 5513's made in the 1970s one 5512 was made. This 1977 Rolex Submariner ref. 5512 is simply exceptional, from its strong case, beautiful fat-font bezel insert, and beautifully well-preserved dial and hands, to its tight bracelet. This ref. 5512 would stand proud in anyone's collection as a classic, yet uncommon diving watch companion. Brand Rolex Style Submariner Model 5512 Serial 54XXXXX Size Men's Material Stainless Steel Dial Matte Black Millimeters 40 Strap Rolex 93150 Oyster Bracelet W/ 580 End Pieces