Rolex Sea Dweller
Rolex created the first 1665 Sea Dweller in 1967 as a response to the Comex S.A. industrial deep-sea diving company’s report that the 5513 Rolex Submariner had failed during deep dives due to inner pressure created at great depths. The very first pre-1665 model Sea Dweller used the 5513 Submariner equipped with a one-way gas escape valve to balance the pressure. Most of these watches were issued to Comex divers, and some even had the “Comex” logo located on the dial.
1665 Sea Dweller Features (Unique from the Submariner)
The 1665 Sea Dweller had upgraded functions that set it apart from the Submariner.
- “Sea-Dweller Submariner 2000” was engraved in two lines on the dial in red letters – hence earning the nickname “Double Red”
- 2000 Feet Depth Rating – the greatest at its time
- The Oyster Case : which was bigger than that of the Submariner (at the time).
- Triplock Crown: featuring a triple gasket system and a thicker crystal that ensured protection in high pressure
- The dial did not have the cyclops magnification bubble, and some models continued to display Comex logo on the dial and even Comex serial number.
From the mid 1970s to 1982, Rolex dropped the “Sea-Dweller Submariner 2000” tag for just “Sea-Dweller” written in white.
16660 Sea-Dweller Model
The next 16660 Sea-Dweller model was released in 1978 and can still be found on the market. It used 3035 movement and had improved depth rating to 4000 feet. It features an enhanced helium escape valve and a sapphire crystal. This model has been used by Comex since 1992.
The newest Sea-Dweller model was released in 2008. The 116660 Rolex Oyster Perpetual Date Sea-Dweller DEEPSEA features a Ringlock System to withstand depth and has the depth rating at 12,800 feet.
It also offers a 25% safety reserve, which is required by the ISO 6425 divers’ watches standard. Rolex Deepsea has a titanium caseback and a scratch-resistant black Carachrom disc bezel. It also has a unique Oyster bracelet with a flip lock extension link and glide lock clasp. To cope with the pressure at colossal depths, the Sea Dweller Deepsea has larger crystal at 5.5 mm and case diameter of 44 mm and case thickness of 17.7 mm. The case and bracelet weigh 220 g.