Double Red · Double Red Mark 4
Sea-Dweller DRSD 1665 — Double Red · Double Red Mark 4
Last Double Red dial and the most common: closed 6s in the depth rating instead of open ones, a heavier print on all four lines in red and white, and a coronet with broader, spikier prongs.
Serial range spans the dated examples cited, not a published range: Bonhams 413xxxx (c. 1975), Phillips 4'196'570 (c. 1976), Phillips 5'286'796 (1977).
Identifying details
- Red “Sea-Dweller”
Model name “Sea-Dweller” printed in red.
- 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
- Undated
- Case serials
- c. 4.13M–5.29M
- Case material
- Stainless steel
- Case diameter
- 40 mm
- Water resistance
- 610 m
- Crystal
- Domed acrylic, no Cyclops
- Movement
- Automatic
More specifications (3)
- Chronometer
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