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.

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…