mah wrote:
If your watch was magnetized it would run slower. There is are possibilities though. If you hear a screw like noise rattle you may have lost a balance screw. This would be rare but the loss of weight would cause the balance to run faster thus speeding up your watch. I was experimenting with a watch that I recently rebuilt taking opposite balance screws out to see the effect of time. The less the weight the faster the balance movement cycles. To slow a watch you add weight. If you lost a screw you should have it looked at there is a possibility of the balance overbanking and possibly breaking the roller jewel. A trip to Breitling would be your best bet. Good luck, Mark
A magnetised watch runs faster, not slower.
You are effectively shortening the balance spring thereby decreasing the amplitude and increasing the frequency = increased vph.
I doubt that it is a balance screw issue as that would have backed out over a period of time and would have indicated symptoms of a failure to keep accurate time that got progressively worse.
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