Graham Caliber G1749

Graham Caliber G1749

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Graham Caliber G1749

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.

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

Please share your experiences and thoughts about the Graham caliber G1749 in the comments section below…

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