With this Sea-Dweller, also nicknamed the “Triple Six,” Rolex doubled the depth rating to 4,000 ft thanks to its larger helium escape valve and sapphire crystal, compared to its predecessor, reference 1665. Furthermore, Rolex introduced a unidirectional bezel for diver safety, making this Sea-Dweller a true transitional model. This example features a rare matte dial, used in the first production batch before Rolex later switched to glossy dials with white gold–surrounded indexes. The dial has developed a lovely vanilla-toned patina on the hour plots and hands. The watch retains a thick case and stands out with a beautifully faded grey bezel insert fitted with a luminova pearl. Attached to the watch head is an Oyster bracelet, reference 93160, with solid end links stamped 592 and a clasp stamped “G”. We love these Sea-Dwellers for their no-nonsense, straightforward, purpose-built tool-watch vibe, and they are easily suited for everyday wear. This watch has been fully checked and regulated by our watchmaker. If you’re looking to add a proper tool-watch icon to your collection, this Sea-Dweller is well worth a closer look.Get in touch with us for further details ,or to arrange a viewing—either in our lounge or via video call. Specifications: Rolex Reference 16660 Sea-dweller 40mm steel case with helium escape valve Rare matte dial with vanilla colour patina on plots and hands 40mm steel case with helium escape valve Serial 747xxxx dating to 1983 Solid link Rolex Oyster bracelet ref. 93160 with Solid End links Fully checked and regulated by our watchmaker 1 year mechanical warranty Free worldwide Fedex Priority shipping