Mark 1 (Flat Registers, T Swiss)
Autavia 2446C GMT — Mark 1 (Flat Registers, T Swiss)
1969–?
Smaller flat registers, “T Swiss” at six, polished hands, white chronograph hand and smooth pushers.
Case numbers of examples shown by OnTheDash: 111318.
No verified image of this watch yet
Identifying details
- 24-hour hand
Fourth, 24-hour hand read against a 24-hour bezel for a second time zone.
- Compressor (snap-back) case
EPSA snap-back case whose gaskets tighten as water pressure rises; Heuer added “C” to the reference.
- Two-colour 24-hour bezel
Rotating 24-hour bezel split into contrasting day and night halves, read with a GMT hand.
Variants of 2446C GMT
Reference overview →| Variant | Production |
|---|---|
| Mark 1 (Flat Registers, T Swiss)Current | 1969–? |
| Mark 2 (Stepped Registers, T Swiss) | Undated |
| Mark 3 (Swiss Only, Fluted Pushers) | Undated |
| Mark 4 (Red-Tipped Hands) | Undated |
Case & movement
- Reference
- 2446C GMT
- Production
- 1969–?
- Case serials
- c. 110,000–111,999Look up Heuer serial numbers
- Case material
- Stainless steel
- Crystal
- Plastic
- Movement
- Manual winding
- Date
- No
- Caliber
- Valjoux 724
Movement
Valjoux 724
Valjoux 72 modified with a 24-hour hand for a second time zone; powers the manual-wind Autavia GMTs of the late 1960s.
Manual winding · 17 jewels