First Series, Double Swiss · Double T Swiss T
Cosmograph Daytona 6239 — First Series, Double Swiss · Double T Swiss T
1963–1964
The tritium “T Swiss T” printed twice, for the same reason as the double Swiss. Grené dial with black serif print; known examples have ROW movements for the US.
No verified image of this watch yet
Identifying details
- Pump pushers
Plain push-piece chronograph pushers, not screwed down.
- Tachymeter bezel
Tachymeter scale engraved on the rather than the dial.
Variants of 6239
Reference overview →| Variant | Production |
|---|---|
| First Series, Double Swiss | 1963–c. 1964 |
| First Series, Double Swiss · Underline Double Swiss | 1963 |
| First Series, Double Swiss · Double Swiss, No Underline | 1963 |
| First Series, Double Swiss · Double T Swiss TCurrent | 1963–1964 |
Case & movement
- Reference
- 6239
- Production
- 1963–1964
- Case material
- Stainless steel
- Case diameter
- 36.5 mm
- Water resistance
- 50 m
- Crystal
- Acrylic
- Movement
- Manual winding
- Date
- No
More specifications (1)
Movement
Valjoux 72B
Rolex designation for its early Valjoux 72-based chronograph caliber. The earliest caliber used in the Daytona, found only in very early 6239s; also recorded in the 6238 and in a 1966 6240. One editorial equates it with the 722 and dates it to 1966.
Manual winding · 17 jewels