Quote:
Originally Posted by toxicavenger
There is no rhyme or reason how many seconds slow or fast it will run when magnetized. There is a ton of mis-information on the parameters for how much it will lose or gain. All of it not true.
Test it and see if it is magnetized.
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Most times when a watch is magnetised the hairspring will stick to itself which shortens the effective length and makes it speed up. This can be a lot of gain, or not that much depending on how severely it is affected.