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Graham Caliber G1749

Graham Caliber G1749

Graham Caliber G1749

BrandGraham
Caliber NumberG1749
Base Caliber
ETA/Valjoux 7750
Movement TypeAutomatic
Jewels25
Diameter13 1/4”’ (30mm)
Height7.9mm
Power Reserve~48 hours
Lift Angle49 degrees
Vibrations Per Hour28,800 (4 Hz) – early models were 21,600
Shock SystemIncabloc
Regulator SystemETACHRON
Chronograph SystemThree-plane cam style
RotorBall bearing system
Winding DirectionUni-directional
Hacking?Yes
FeaturesHours, minutes, small seconds disc, central chronograph seconds, 30 minutes counter, 12 hours counter, day, date
Country of ManufactureSwitzerland
Known ModelsGraham 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.

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.

Eta Valjoux 7750 Drawing

Examples of watches with this caliber

Extra Information

  • Other calibers based on the ETA 7750 here

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