The Valjoux 729 is a hand-winding chronograph movement with GMT function in the Valjoux 72 family. The GMT function uses a central 24 hour hand that can not be adjusted independently and thus requires a rotating bezel to read. Cal. 729 replaced lower-beat rate Cal. Valjoux 724 around 1974 and was produced through the 1970s, though some sources suggest that it was introduced as early as 1969.
- Central hours and minute hands
- Central chronograph seconds
- Central 24 hour hand
- 30 minute counter at 3:00
- 12 hour counter at 6:00
- Running small seconds at 9:00
Valjoux 23/72 Family Movements
The Valjoux Cal. 23/72 family was primarily made up of eight movements, with all others being variations on these. Many components are shared between most or all of these movements, with the main variations happening together over the long production of the series.
- Cal. 23 VZ – Basic movement with no hour counter
- Cal. 72 VZH – Basic movement with hour counter
- Cal. 72c VZHC – Cal. 72 with triple calendar
- Cal. 88 VZHCL – Cal. 72c with moon phase
- Cal. 78 VZSC – Non-chronograph triple calendar
- Cal. 90 VZSCL – Cal. 78 with moon phase
- Cal. 69 DX – Compact 10.5 ligne chronograph
- Cal. 89 DXC – Compact 10.5 ligne triple calendar
| Complications | 18,000 A/h No Chrono | 18,000 A/h No Hours | 18,000 A/h Hour Counter | 21,600 A/h No Hours | 21,600 A/h Hour Counter |
|---|---|---|---|---|---|
| Base | 23 VZ 69 DX | 72 VZH 722 | 236 | 726 727 | |
| Flyback | 230 | 720 | 235 | 725 | |
| Date | 232 | 234 | |||
| Triple Date | 78 VZSC | 23C | 72c VZHC 723 | 730 | |
| Flyback and Date | 237 | ||||
| 24 Hour Hand | 724 | 729 | |||
| Calendar and Moon Phase | 89 DXC 90 VZSCL | 88 VZHCL | 886 | ||
| Tide Calculator | 721 |