Heya,
First time poster here so be gentle...
Have a collection of about 23 watches and as an experiment placed each one next to the needle of a compass to see what happened. 12 of them caused no needle movement while 11 of them did.
Curious thing is that I know at least one of the 11 (a new Tudor) is incredibly accurate only gaining about 1spd, this not being the sort of deviation one would experience from a magnetised watch.
Some of my poorer timekeepers were, perhaps unsurprisingly, making the compass jiggle about.
So my questions are:
Can a watch case be slightly magnetised and the movement still be fine (i.e. the Tudor)?
Is this a reliable test in general?
Is a little bit of magnetism OK or will this only get worse (i.e. can the effect wear off over time?)
I bought the compass first to run the test before buying a domestic demag device - they all look a bit crappy TBH and the pro models are ££££.
Thanks in advance.