Small Daytona
Cosmograph Daytona 6240 — Small Daytona
Undated
Small “Daytona” under “Cosmograph”, no sigmas at six. The most often seen 6240 dial.
Estimated at approximately 1,700 examples.
No verified image of this watch yet
Identifying details
- Screw-down pushers
Chronograph pushers that screw down onto the case for water resistance.
- Tachymeter
Variants of 6240
Reference overview →| Variant | Production |
|---|---|
| Small DaytonaCurrent | Undated |
| Big Daytona | Undated |
| Floating Daytona | c. 1967 |
| Oyster Signature | Undated |
Case & movement
- Reference
- 6240
- Production
- Undated
- Case material
- Stainless steel
- Case diameter
- 37.5 mm
- Water resistance
- 100 m
- Movement
- Manual winding
- Date
- No
- Caliber
- Valjoux 72B — Catalogued for a c. 1966 example
- Valjoux 722
Dial, bezel & hands
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
Valjoux 722
Rolex-modified Valjoux 72 at 18,000 vph, fitted to the 6238, 6239, 6240 and 6241. Described by one editorial as adding a Breguet overcoil and a free-sprung, variable-inertia balance.
Manual winding · 18,000 vph · 17 jewels