Pre-owned Rolex Sea-Dweller – London & Hatton Garden

The Rolex Sea-Dweller

The Sea-Dweller was developed for professional saturation divers and launched in 1967. Its defining feature is the helium escape valve, which lets gas that builds up inside the case during long decompression periods escape safely before it can damage the watch. It is the more technical sibling of the Submariner, with a thicker case and far greater water resistance.

The current Sea-Dweller, reference 126600, was introduced in 2017 to mark the model's 50th anniversary. Its 43mm Oystersteel case is water resistant to 1,220 metres, and it was the first Sea-Dweller to have a Cyclops lens over the date. A single line of red text on the dial recalls the earliest examples. Earlier references such as the 16600 and 116600 use a 40mm case without a Cyclops and remain popular with collectors who prefer a more compact fit.

Why buy your Sea-Dweller from us

We inspect and authenticate every Sea-Dweller before it is listed, and each listing states the reference, year, condition and whether the box and papers are included. Purchase directly with Buy now through our secure checkout or, if you prefer, buy the same watch on eBay. UK delivery is free and fully insured.

All our watches include a 12-month mechanical warranty, and website purchases are covered by our 14-day returns policy. A Sea-Dweller wears larger than a Submariner, so if you would like to try one first, book a viewing at 88-90 Hatton Garden. Part exchange is available against any watch in stock.

Visiting in person? See how to find our Hatton Garden office. Selling? Start a valuation on our sell your watch page, or trade towards your next watch with part exchange. You can also filter all watches by Sea-Dweller.

SecondHand Timepieces is an independent pre-owned specialist and is not affiliated with or an authorised retailer of Rolex SA.