Closeup of the Hamilton

Hamilton Watch Repair – Valjoux 7750

In Hamilton Repairs by Mark Lovick0 Comments

A nice Hamilton watch with a Valjoux 7750 movement in for repair and regulation.

The Hamilton Watch Company was formed in 1892 in Lancaster, America as a high quality watch brand said to be named after James Hamilton (a local land owner). Hamilton became popular for its railway watches and went on to manufacture military watches and Marine Chronometers during WW2.

Hamilton is now a subsidiary of the Swatch Group of companies and utilises their ETA watch movements.

This watch was not keeping time (about 300 seconds a day loss on my machine) and was not winding correctly due to a worn ballrace.

Hamilton watch out of its case

Hamilton watch out of its case

 

Closeup of the Hamilton

Closeup of the Hamilton

 

The Valjoux 7750 Movement - after service

The Valjoux 7750 Movement – after service

The ballrace (rotor bearing) is worn and causing the oscillating weight (rotor) to wobble. As the 7750 only winds in one direction this has a very profound effect on the winding of the watch. So I am replacing it. This happens a lot on 7750’s

The old ballrace is off and ready to fit the new one

The old ballrace is off and ready to fit the new one

Fitting the new ballrace using the special tool

Fitting the new ballrace using the special tool

New ballrace fitted to the oscillating weight

New ballrace fitted to the oscillating weight

The watch finished and back in its case

The watch finished and back in its case

 

The finished Hamilton watch

The finished Hamilton watch

 

 

If you have a Hamilton watch which is in need of repair please contact me and I will be most pleased to provide you with a quote.

 

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