Double Red Mark 2 · Double Red Mark 2, Patent Pending
Sea-Dweller 1665 — Double Red Mark 2 · Double Red Mark 2, Patent Pending
c. 1969–?
Mark 2 dial in a “Patent Pending” case. Most of the third prototype batch (2.247 million, third quarter of 1969) carried this dial.
No verified image of this watch yet
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.
- Red “Submariner”
Model name printed in red.
- 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 Valve | 1967–1968 |
| Double Red | 1967–1977 |
Case & movement
- Reference
- 1665
- Production
- c. 1969–?
- 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