VALJOUX 7750 AND 7753 BASEDCollection
The Hamilton H-31 and H-21 have their watchmaking roots in the ETA 7753 and 7750 chronograph Valjoux movements. From the barrel to the mainspring, the entire kinematic chain of the two new movements has been refined to increase the power reserve from 42 to 60 hours and assure optimal reliability and accuracy. Excellent stability and precision come from the glittering of the spiral.
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