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The story
The Sea-Dweller of 1967 was built for saturation divers, who live under pressure in helium-rich habitats. During decompression helium trapped in an ordinary watch can force the crystal off; Rolex’s answer was a helium escape valve in the case side.
Depth ratings rose from 610 to 1,220 metres. The 16600 kept the classic 40 mm case until 2008; the 126600 of 2017 grew to 43 mm and added a Cyclops lens to the date.
| Years | References | Calibre | What changed |
|---|---|---|---|
| 1967–c.1983 | 1665 | 1575 | 610 m; 'Double Red' early dials |
| 1978–1988 | 16660 'Triple Six' | 3035 | 1,220 m; sapphire crystal |
| 1988–2008 | 16600 | 3135 | Last 40 mm Sea-Dweller |
| 2014–2017 | 116600 'Sea-Dweller 4000' | 3135 | Ceramic bezel; 3-year run |
| 2017–today | 126600, 126603 | 3235 | 43 mm, Cyclops lens |
Reading a Sea-Dweller reference
126600 is the current Sea-Dweller in Oystersteel; 126603 the Yellow Rolesor version. Earlier: 116600 (2014–2017), 16600 (1988–2008), the ‘Triple Six’ 16660 and the original 1665.
Current models and prices
Every Sea-Dweller reference Rolex currently lists for India, with the retail price shown on rolex.com/en-in on 8 October 2026, including taxes. Where a reference comes with several dials or bracelets, the range is shown.
| Reference | Model | Case | Calibre | India price, 8 Oct 2026 |
|---|---|---|---|---|
| 126600 | Sea-Dweller | Oystersteel | 3235 | ₹14,14,000 |
| 126603 | Sea-Dweller | Yellow Rolesor | 3235 | ₹21,86,000 |
The calibre
Calibre 3235 with about 70 hours of power reserve; the 16600 and 116600 used calibre 3135.
Materials
Oystersteel and Yellow Rolesor, with a Cerachrom ceramic bezel insert. Waterproof to 1,220 metres.
- A helium escape valve on the case side
- Depth rating on the dial that suits the reference
- Calibre 3235 in a 1266xx
- Matching papers
- No helium valve on a ‘Sea-Dweller’
- A Cyclops lens on a pre-2017 reference
- Wrong-generation bezel insert
- Papers that do not match the case
Frequently asked questions
It lets helium that has entered the case during saturation diving escape during decompression, so the crystal is not forced off.
1,220 metres.
The Deepsea is larger and rated to 3,900 metres using the Ringlock system.