Service/Repair Cyma calibre 485

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This Cyma has a super funky 1960’s atomic design and looks to be in good condition. It’s not keeping time, but hopefully a service will sort that out.

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Well that is a good indication that it needs some work.

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The funky calibre 485 is one of the most under appreciated movement’s of the 1960’s

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Very nice autowinder construction.

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It works on the same principle as the Revue calibre 87. The oval rotor cam engages with a fork that has two fingers that drive the intermediate wheel.

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With the dial and hands removed you can see the funky roulette table black and red date disk.

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Here you can see the date mechanism.

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The movement is quite dirty.

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Here you can see the gear train layout after removing the train bridge.

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Almost taken apart.

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Like the revue cal 87, the movement has a centre pinion rather than a centre wheel. On this base movement a repair had gone wrong, The replacement bush for the centre pinion was fitted in very crooked! I only noticed this after fitting the hands back onto the movement and they almost touched the dial at 3 and stood up at 9 touching the crystal. I had a base plate from a good donor movement. It ended up with me taking the movement apart again and using the parts from the first movement on the new base plate.

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Very dirty mainspring.

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Movement nice and clean and ready to be put back together again.

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Balance moves freely. Note the cool Cymaflex shock protection.

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Mainspring in a cleaned barrel.

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Movement back together and running.

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Movement preforming well.

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Dial and hands back on the movement.

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Dial and hands off the movement again as it needed the cannon pinion tightening.

Cyma calibre 485

Finally the movement goes into the case working like it should!

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It took a lot of time, but finally back together and no doubt it was worth the effort.

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The last watchmaker that worked on this watch scratched over his service number, probably to hide the damage done. But now the problem is fixed!;)

Cyma 485

Just love the design of this watch!

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4 Responses to Service/Repair Cyma calibre 485

  1. andrew says:

    great looking watch, very 60s – how do you tighten the CP? I insert a broach snugly inside the cannon pinion and nip with pliers – wondered whether there is a better technique?

    Like

    • mitka88 says:

      Hi Andrew,

      I also use sharp pliers with a good edge. Do you also work as a watchmaker?:)

      Best regards,

      Mitka

      Like

      • andrew says:

        An enthusiastic amateur! I’ve worked on watches for about 10 years and still find them fascinating – mainly mechanical and ideally something with a complicated complication – weirdly I really like early 70s quartz watches at the moment (dynatrons, early omega & tissot 1310, 1330…etc) and Harwood automatics (he was originally from Bolton, up the road from me in Manchester so a northerner like me!). Great work, keep it up!

        Like

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