Rolex Sea-Dweller 1665Rolex Sea-Dweller 1665

Rolex Sea-Dweller Ref. 1665 B+P Rail Dial

The Rolex Sea-dweller evolved from the Rolex Submariner in the late 60s. Rolex worked closely with COMEX, a French commercial diving company during these years. The divers of COMEX worked at great depths on dangerous assignments and therefore placed heavy demands on their equipment. At a certain moment, the COMEX men discovered that the Submariner was no longer sufficient. What was the case? When diving with diving bells, helium could come into the cupboard under great pressure. However, if one rose again and the pressure became lower, this gas could cause the watch to “explode”. A solution has been found in the helium valve: this valve opens as soon as the pressure inside the watch is higher than that outside which allows the gas to escape.

The Seadweller 1665 that we offer you here is a particularly beautiful item.  Serviced by Rolex, so it comes with the service papers, the case is razor-sharp! As an enthusiast, we like the creamy color of the markers, something that really watch connoisseurs prefer to see. It has the MK II  Rail dial, produced by Stern only for the 5 million numbers, from 1977 till 1979. The case number is completely shown in the back case.

In short, this is the “real vintage deal”. This Rolex Seadweller is a collector’s item. Thicker than the Submariner, with a date but not with the characteristic “date coupon”. Are you interested in this amazingly beautiful Sea-dweller and can you appreciate the original condition? Then stop by Reestraat and we will tell you all the secrets of this watch.

And pssst…it has original box and papers!


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Brand Rolex
Movement Automatic
Model Sea-Dweller
Diameter 40 mm
Reference 1665
Bracelet/strap: Steel
Year of production (circa) 1979
Lug Width 20 mm
Material Steel
Set Content Original box & papers
Crystal Acrylic
Warranty 2 year (AWCo)
Dial color Black

The Sea-Dweller is a more hardcore version of the Submariner. Quite literally, as it was developed with French marine engineering company Comex on the Submariner platform, to withstand greater depths. The Ref. 5514 Submariner formed the starting point. A tougher case back and a helium escape valve were added, upping the water resistance to 2000 feet or 610 meters. The Sea-Dweller Ref. 1665 was born in 1967.

A date complication was required, because many professional dives and decompression sessions would last days or even weeks. The helium escape valve prevented the crystal from popping out when saturation diving. An issue the Submariner would never run into during more casual SCUBA dives.

The Ref. 1665 came in several different dial variants, throughout its 16 years in production. From Double red Sea-Dwellers to Great whites and several subtle variations with differing degrees of rarity within those variants. A particularly legendary version is the Single red, of which only 12 are known to exist.

The Rolex Sea-Dweller was updated to the Ref. 16660 in 1978. The tritium dial was replaced by a LumiNova version in 1998/99. Several other variations exist within this reference. Later updates, among which the Deepsea and the James Cameron, saw an increase in size and a ceramic bezel, among other updates.

The Sea-Dweller is arguably the most toolish of all Rolex models. Where the Submariner has become a cross-over between diving and casual wear, the Sea-Dweller always remained a tool for exploring the bottom of the ocean. While quite similar to the Sub in appearance, it does convey a lot of that feeling when you handle it. So if you are of the adventurous inclination, the Sea-Dweller might just suit you perfectly. And do not worry if you put a scratch on it. Looks even better!


At AWCo we put the safety of our shipments upfront at all times. Therefore, we ship all our packages insured.

We strive to promptly handle packages to minimize delays. Delivery times begin from the day of dispatch. While we make every effort to ensure smooth delivery, we cannot be held responsible for delays caused by destination customs, local duties, taxes, or lost items during transit.

Certainly, we understand that overloaded mail-order companies can also contribute to potential delays in the delivery process. Despite our best efforts, external factors beyond our control may affect shipping times. Rest assured, we remain committed to providing timely service and will work diligently to ensure your order reaches you as promptly as possible. For any inquiries or updates, feel free to reach out to us at Your satisfaction is our priority.






Year of production (circa)






Dial color





40 mm



Lug Width

20 mm

Set Content

Original box & papers