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    At Bob's Watches, your trust is very important to us. We believe that buying a pre-owned Rolex watch online should be simple, honest, and straightforward. To that end, we guarantee that every Rolex watch on our site is 100% authentic, comprised entirely of Rolex parts. Our mission is to be the leading trusted online source for selling and buying authentic pre-owned Rolex watches. We stand behind this authenticity guarantee with a full money back refund on any watch not found to be completely genuine.

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100% Certified Authentic

Bob's Watches
100% Certified Authentic

At Bob's Watches, your trust is very important to us. We believe that buying a pre-owned Rolex watch online should be simple, honest, and straightforward. To that end, we guarantee that every Rolex watch on our site is 100% authentic, comprised entirely of Rolex parts. Our mission is to be the leading trusted online source for selling and buying authentic pre-owned Rolex watches. We stand behind this authenticity guarantee with a full money back refund on any watch not found to be completely genuine.

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ROLEX BLOG

Vintage of the Week: Sea Dweller Ref 1665

May 11, 2018

BY Paul Altieri

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A Sea Dweller Reference 1665 aged to perfection

A Sea Dweller Reference 1665 aged to perfection

Vintage Rolex watches, such as the Rolex Sea Dweller was originally developed in conjunction with COMEX, a French company that specializes in engineering and deep diving operations. In the 1960s COMEX needed a diving watch for their professional divers to use while working on deep-sea oil rigs. These watches needed to be waterproof up to a certain depth to ensure they would perform properly. Rolex made modifications to their regular Submariner watch and created the Sea Dweller. By 1967 the new Sea Dweller, ref 1665, was fitted with a helium escape valve and offered for commercial sale. Sea Dweller ref 1665 was produced for approximately ten years, from 1967 to 1977.

Bezel & Dial Rolex Sea Dweller

Bezel & Dial Rolex Sea Dweller

The helium escape valve was an important addition to the Sea-Dweller reference 1665. The valve ensured that helium that had built up in the watch during a dive was allowed to escape without damage to the timepiece or allowing water in. The extremely durable new Sea Dweller was capable of reading a depth of 610 meters (2000 feet) without damage to the watch. Rolex also made other improvements to ref 1665 including a thicker profile crystal and a larger reinforced case. The Oyster case features a Triplock crown and was available in stunning and durable stainless steel.

Movement Rolex Sea Dweller

Movement Rolex Sea Dweller

Sea Dweller 1665 features a caliber 1570, 26 jewels movement. Throughout its production, the black matte dial had four different dial variations, categorized as Mark I, Mark II, Mark III and Mark IV. Ref 1665 is known as the “Double Red Sea Dweller” because the dial features two lines of red text reading “SEA DWELLER” and “SUBMARINER 2000.” The “Double Red” Sea Dweller is extremely popular among watch collectors, with some versions selling for much more than a normal Sea Dweller. The dial also features tritium hour markers and an aperture for the date in place of the 3 o’clock mark.

Vintage Rolex Sea Dweller

Vintage Sea Dweller Reference 1665

Ref 1665 was succeeded by the Rolex Oyster Perpetual Sea Dweller 4000 which can reach a depth of 1220 meters (4000 feet). The Sea Dweller 4000 Rolex reference number is 16600 and has been issued to COMEX divers since 1992.

Back Case Rolex Sea Dweller

Back Case Rolex Sea Dweller

The Double Red Sea Dweller is one of the most highly sough- after vintage Rolex wristwatches. Though initially created for divers, this reference has the right amount of style, class and functionality to appeal to a wider audience. Its fascinating history, impressive technological innovation and unique red lettering make it a true piece of Rolex craftsmanship.

Bracelet Clasp Rolex Sea Dweller

Bracelet Clasp Rolex Sea Dweller

Crown Rolex Submariner

Crown Rolex Submariner

Inside Back Case Rolex Sea Dweller

Inside Back Case Rolex Sea Dweller

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    Bob's Watches is an independent watch dealer and is not sponsored by, associated with and/or affiliated with Rolex, or any other brand listed. Bob's Watches only sells pre-owned watches and provides its own warranties on the watches it sells. Rolex Datejust, Rolex Day Date President, Submariner, Presidential, Explorer, Sea Dweller, Super President, GMT Master, GMT, YachtMaster, Prince, Milgauss, MasterPiece, Air King, Cosmograph Daytona, and PearlMaster, etc are all registered trademarks of the Rolex Corporation. All brands including Brequet, Cartier, Audemars Piguet, Patek Philippe, Ulysse Nardin, Breitling and Omega, etc are trademarks of their respective owners.