| Manufacturer | Valjoux |
| Caliber Number | 7734 |
| Base Caliber | 7733 |
| Movement Type | Mechanical, manual-wind |
| Lignes | 14”’ |
| Diameter | 31mm |
| Height | 6.65mm |
| Power Reserve | (Needs confirmed) |
| Lift Angle | 48 degrees |
| Jewels | 17 |
| Vibrations Per Hour | 18,000 bph (2.5 Hz) |
| Anti-Shock System | Incabloc |
| Chronograph System | Coulisse Lever (aka cam lever) |
| Hacking? | No |
| Features | Hours, minutes, central chronograph seconds, running seconds subdial, 30 minutes subdial, date |
| Country of Manufacture | Switzerland |
| Known Models | (Please add your watch in comments below…) |
The Valjoux caliber 7734 is a 17 jewel manual-wind mechanical movement that was produced in Switzerland until ~1974.
Some of the topics covered in this caliber listing:
Similar Calibers:
The Valjoux 7734 is based on a similar caliber 7733. The main difference is that the 7734 has a date complication and the 7733 does not. This makes the 7734 slightly taller than the 7733 at 6.65mm compared to 6.00mm.
There is also a caliber 7736 which has a 12 hour chronograph subdial in addition to the 30 minute recorder on the 7734. The 7736 is even taller at 7.4mm compared to the 7734 at 6.65mm.
Swiss Valjoux 7734 to Russian Poljot 3133:
After the introduction of the famous ETA/Valjoux caliber 7750 automatic chronograph movement, the machinery used to produce the 7734 was sold to the USSR. This transfer of technology spawned the Poljot caliber 3133.
7734 Chronograph Operating Instructions:
Button sequence: Top, Top, Bottom.
- Top button: Start/Stop
- Bottom button: Reset
Chronograph Hand Lining Up:
Unlike quartz powered chronograph movements, mechanical watches do not have the luxury of using a reset sequence to get the chronograph hand to line up to 12:00. If your caliber 7734 powered watch has a hand that is not lining up, it could be a mechanical problem and should be inspected by a professional watchmaker. Your watch may need serviced or the hand might need to be reinstalled.
Additional Resources:
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