Black Dial with Tachymeter (NT)
Carrera 12 2447 — Black Dial with Tachymeter (NT)
1968–?
All-black dial and registers with a 50–200 tachymeter track; shown in the 1968/69 catalogue.
Identifying details
- Tachymeter scale on dial
Tachymeter track printed on the dial.
Variants of 2447
Reference overview →| Variant | Production |
|---|---|
| First Execution, White Dial (S) | 1963–? |
| First Execution, White Dial (S) · Early First Execution, Eggshell Dial, Standard (Slotted) Back | 1963–? |
| First Execution, White Dial (S) · Early First Execution, Eggshell Dial, Polygon Back | 1963–? |
| First Execution, White Dial (S) · Later First Execution, Silver-White Dial, Polygon Back | 1963–? |
Case & movement
- Reference
- 2447
- Production
- 1968–?
- Case material
- Stainless steel
- Case diameter
- 36 mm
- Crystal
- Plastic
- Movement
- Manual winding
- Date
- No
- Caliber
- Valjoux 72
Dial, bezel & hands
Movement
Valjoux 72
13-ligne hand-wound chronograph with column wheel and horizontal clutch, descended from the 14-ligne Valjoux 22/23. Its 12-hour counter at six set the classic three-register layout. Made 1938–1974 and used by Rolex, Heuer and many others; Rolex fitted it to the pre-Daytona ref. 6234.