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ETA 2879 regulation...how to?


ldegeneve

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Similarly to many other movements, like many Miyota and clones, you have to deal with the 2 parts extending from balance bridge. The one where the hairspring ends is the hairspring terminator, and should be touched only to regulate the beat error. The other one where the hairspring pass through is the timing regulator.

Touch it only if you have a timegrapher: moving it like 1/10 mm you'll have the watch running faster or slower even 60/80 sec/day. So without a timegrapher it will be a damn nightmare to regulate it (and also with the machine isn't so easy: you must have an incredibly firm hand to move it but not to much).

Edited by GenTLe
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  • 3 years later...

The lever with the brass piece is the speed lever. Push it away from the lever with the stainless piece. That will speed it up. You do know without a timegraph you are only guessing. Before you do your adjustment find a reference point so you can return the lever to it"s original spot. I do not recommend you do this without a machine or a kello app.at the very least. Sometimes the levers are so sensitive, you can't even see it move and it can make 30 seconds difference. Good luck

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