Single Red · Single Red, With Gas Escape Valve
Sea-Dweller SRSD 1665 — Single Red · Single Red, With Gas Escape Valve
Single Reds fitted with a valve, with hand-engraved “Patent Pending” casebacks. Case 1,820,177 (Dr Ralph Brauer, made 1968) is regarded as the first valve prototype and the first to be marked “Gas Escape Valve”; the valve was then retrofitted to some 1.6 million cases for SEALAB 3 crews.
Identifying details
- Red “Sea-Dweller”
Model name “Sea-Dweller” printed in red.
- “Patent Pending” caseback
Caseback engraved “Patent Pending” for the gas escape valve, used before the Swiss patent was granted in June 1970.
- Date
Date display.
- Helium escape valve
One-way valve on the left flank of the case.
Variants of 1665
Reference overview →| Variant | Production |
|---|---|
| Single Red | 1967–1968 |
| Single Red · Single Red, No Gas Escape Valve | 1967 |
| Single Red · Single Red, With Gas Escape ValveCurrent | 1967–1968 |
| Double Red | 1967–1977 |
Case & movement
- Reference
- 1665
- Production
- 1967–1968
- Case material
- Stainless steel
- Case diameter
- 40 mm
- Water resistance
- 610 m
- Crystal
- Domed acrylic, no Cyclops
- Movement
- Automatic
- Chronometer
- Yes
More specifications (2)
- Date
Movement
Rolex 1575
Date caliber with an instantly jumping calendar and no quickset, shared with the GMT-Master, Datejust and early Sea-Dweller. Hacking seconds added in 1971 (HODINKEE’s Submariner guide and Bob’s 1680 guide give 1972). The rotor bridge is marked 1570.
Automatic · Introduced 1965 · 19,800 vph · 48 h reserve
Read more
- The Sea-Dweller Chronicles: Genesis Of The Decompressing WatchRead more at Perezcope (opens in a new tab)
- All Single Red Sea-Dwellers, side-by-sideRead more at Perezcope (opens in a new tab)
- The History of the Rolex Sea-Dweller, The Crown’s Ultimate Dive WatchRead more at Monochrome (opens in a new tab)
- The Sea-Dweller Chronicles: Dry Run And Teaming Up With Comex