Service: Yema Chronograph calibre Valjoux 92

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A client had sent in this cool Yema chronograph, it is missing it’s bezel ring insert and not keeping time.

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When the Timegrapher can’t pick up a signal it’s a good indication the movement needs a service;)

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Movement looks to be in nice condition.

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Dial and hands are in excellent condition.

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I now start taking the chronograph layer apart.

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The click is situated on the dial side of the movement.

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It’s good to take photos to keep track of where all the springs go.

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The winding/setting mechanism is a little old fashioned.

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I now start taking the base movement apart.

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The ratchet wheel is underneath the barrel.

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Old mainspring.

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Here you can see all the parts cleaned and ready to be put back together.

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New mainspring in the barrel.

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I see that the balance moves freely after fitting the cap jewels.

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Base movement back together and ticking.

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That’s a little better;)

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I now start putting the chronograph layer back in place.

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Plenty of wire springs in the Valjoux 92.

Valjoux calibre 92

Movement back together.

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Ready for dial and hands.

Yema diver

Great looking dial.

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Movement back in the case.

Yema chronograph

I fit a new bezel ring insert and the watch looks great!

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4 Responses to Service: Yema Chronograph calibre Valjoux 92

  1. andrew cookson says:

    Interesting that the bezel numbers are reversed. Is there a reason for this?

    Like

  2. Harry says:

    hi is the new bezel original or aftermarket part?

    Like

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