Have a look here for demagnetizers - certainly not an endorsement of the business as I avoid them at all costs based on some bad experiences with them, but that page will give you an overview of what's available. I have the red Vigor model shown there.
Most demagnetizers don't tell you if the watch is magnetized, but there are some that do - one on that page does. Witschi makes one that's even more expensive that will check the level of magnetism and then demag the watch. Personally I use the timing machine as the basis of determining if the demag has been successful.
Not convinced your watch is magnetized though, since the amount of gain is very small...
Cheers, Al
Click to expand...