Cervice Longines Ultra-Chron calibre: 431

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The Ultra-Chro generation movements are Longines entry to the high beat race of the late 1960’s. This costumer watch is in good condition and needs a routine service.

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This watch is actually keeping decent time, but the amplitude is low and the jewels dry.

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Very nice looking movement

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The osculating weight has washer underneath which is important not to forget.

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The date mechanism is very snappy when changing date.

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Here you can see more of the date mechanism.

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Winding/setting mechanism.

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Here you can see the workings of the auto-winder bridge. The brown wheel is the reverse wheel and it needed changing.

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The gear train coming out. High beats are much more sensitive to dirt than low beat movements.

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Hmmm is the barrel trying to tell me something?

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I don’t like opening these riveted barrels, but in an automatic watch I have to clean the mainspring and put new grease on the barrel walls, or it will not slide properly and can cause the watch to bank.

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Everything cleaned and ready to be put back together.

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The mainspring back in the barrel looking good.

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I see that the balance moves freely.

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Movement comes together without any issues.

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Winding/setting mechanism coming back together.

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Date mechanism back together.

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Auto-winder bridge back together.

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Movement back in the case.

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That’s more like it.

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Great looking movement with performance to match.

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I really like the design of this watch.

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2 Responses to Cervice Longines Ultra-Chron calibre: 431

  1. AndrewM says:

    You opened the barrel? You fiend. Watch out for the helicopters, they’re looking for you now. 🙂

    Like

  2. Gary says:

    Fantastic! Always excited to see one come back to life from a great service!

    Like

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