Service Certina 25-36

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This stylish Certina is not running and I suspect it has a broken mainspring. 

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Movement does not look too bad.

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Here you can se the winding/setting mechanism. 

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Train bridge removed and you can see the gear train. 

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As expected a broken mainspring.

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All the parts clean and ready to go back together.

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New mainspring fitted.

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I see that the balance moves freely.

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Movement comes together without any problems.

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Setting/winding mechanism back in place ready for the dial.

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Movement looking very good.

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Watch is preforming okay, but I was expecting better.

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I found that the mainspring I ordered from our supplier is thinner than originally specified, so I order a NOS mainspring on E-bay.

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The upper barrel arbor hole was borderline worn so I decided to make and fit a new bush.

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I feel much better about the watch now that it has the correct mainspring and I have repaired the upper barrel arbor hole with a new bush:)

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That is more what I was expecting from this watch;)

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Very nice dial on this watch! I also replaced the crumbling old luminous compound.

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Real mid 60’s classic.

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2 Responses to Service Certina 25-36

  1. Brandon says:

    I’m so jealous of the lighting in Christian’s and your shop. There seems to be not a bit of yellow light in there. I imagine most of that can be attributed to north facing windows. Any other secrets? Maybe like the type of overhead or bench lights?

    Like

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