The Rolex Sea-Dweller reference 126603 is a 43mm timepiece in Steel and Yellow Gold presented in used condition, with a Black Standard dial, Black Ceramic Standard bezel, Oyster bracelet. Every watch is inspected and authenticated by our specialists before it is offered, so you can buy with confidence.
Developed alongside COMEX, the saturation-diving specialists, in the late 1960s, the Sea-Dweller sits in Rolex's professional dive range between the Submariner and Deepsea. Its hallmark is the helium escape valve at nine o'clock, which equalizes pressure as divers decompress. On steel references the date carries no cyclops magnifier, a choice enthusiasts admire. When authenticating, we look closely at that valve and dial. The Rolesor option extended the line's reach. Read the full Sea-Dweller buying guide ›
Durability and precision turned a 1905 Geneva start-up into the benchmark for mechanical watches. Hans Wilsdorf built Rolex around waterproofing, self-winding movements, and date displays, and the brand now leads the prestige sports market while trading like an asset class. Before you decide, we confirm the Oyster case, Perpetual movement, and Cyclops lens in house. With Submariner, GMT-Master II, and Daytona above retail, that verification earns its place. Browse all Rolex ›
Rolex · 126603
A 43mm Steel and Yellow Gold Rolex Sea-Dweller with a Black Standard dial, Black Ceramic Standard bezel — authenticated and ready to wear.
