| Brand | Graham |
| Caliber Number | G1749 |
| Base Caliber | ETA/Valjoux 7750 |
| Movement Type | Automatic |
| Jewels | 25 |
| Diameter | 13 1/4”’ (30mm) |
| Height | 7.9mm |
| Power Reserve | ~48 hours |
| Lift Angle | 49 degrees |
| Vibrations Per Hour | 28,800 (4 Hz) – early models were 21,600 |
| Shock System | Incabloc |
| Regulator System | ETACHRON |
| Chronograph System | Three-plane cam style |
| Rotor | Ball bearing system |
| Winding Direction | Uni-directional |
| Hacking? | Yes |
| Features | Hours, minutes, small seconds disc, central chronograph seconds, 30 minutes counter, 12 hours counter, day, date |
| Country of Manufacture | Switzerland |
| Known Models | Graham Silverstone RS |
The Graham calibre G1749 is based on the legendary ETA/Valjoux caliber 7750 automatic chronograph movement. This movement was found in a Graham Silverstone RS watch. The caliber G1749 has been redecorated by Graham, most notably the racing inspired rotor. This movement does not appear to be used in other Graham models.
Some of the topics covered in this caliber listing:
Graham reference numbers using this movement:
- 2STEA.B11A
- 2STEA.B12A
- 2STEA.B15A
- 2STEA.B16A
- 2STEA.B17A
- 2STEA.U01A
- 2STEA.U02A
- 2STEA.U04A
- 2STEA.U05A
G1749 Chronograph Operating Instructions
- Top button: Start/Stop
- Bottom button: Reset
Button sequence: Top, top, bottom.
Examples of watches with this caliber
Extra Information
- Other calibers based on the ETA 7750 here
Please share your experiences and thoughts about the Graham caliber G1749 in the comments section below…
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