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Serviced movement loosing power reserve. Normal?


slask111

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Hi,

I bought a watch with a A7750 two years ago and had it serviced by a trusted watchsmith on this forum since i love the watch and want to keep it. The watch have had a good power reserve of about 40h since that service.

I have lately noticed that the power reserve now is down to about 10h. The watch works great otherwise, i have not had it in water and i never use the chrono functions.

As a n00b my question is if this is something i can expect from a serviced watch?

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Well. A watch is like a car. You buy it in perfect condition and even when you treat it very very well it's always possible that something breaks down. A movement (like the motor in your car) is under constant strain. Riding your bike, a walk in the park, playing with your dog, running after your toddler.. it's always possible something breaks, get's loose or shifts out of place. Also a movement is never dust proof. The crown is always the entry point (when setting or winding). Maybe a little dirt or debree got in and is causing problems. Who knows? If it got a proper service it usually is something small. Just have it looked at.

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If the PR dropped dramatically to the level you are seeing now and the watch was always keep wound then best bet is the main spring let go. Happened to me 2 weeks after I finished a service on one of my pieces. The main spring is under constant stress from expansion and contraction. This is why I now replace the main spring on every gen. Pain in the a$$ having to replace it 2 months after a full service because it let go.

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Yea you are right. Its just hard to se my baby feel bad. Its maybe time for the movement to get some more love. I wont give my watchsmith a hard time ;)

Thnx!

If It were me I would contact whoever did the service. Thats not giving this person a hard time,just wondering why a fully serviced movement Is loosing PR. Im sure the person would give you some sound advice,as Bike Mike. Good luck.:) Mike

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