*Practical* acceptable amplitude expectations for a vintage watch
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Not super desperate for it quickly, if I order from abroad it's going to take a month anyway... It might just be a case of waiting for a donor movement to come up. If you have one that would be really helpful though
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Just place the watch over the MECANIC part and activate it. The magnetic field will induce a voltage in the coil and cause the hands to rotate. This does sometimes help to free a stuck mechanism where you can see the second hand twitching but not moving, but the main purpose is it shows the coil doesn't have a break.
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By Neverenoughwatches · Posted
How does that work Andy ? I usually test the coil and circuit boards for continuity I understood that the field generator acted on and spun the permanent magnet rotor to turn the train. Love that stuff WW i use it for allsorts of things. -
Ok, I can now confirm for sure that the issue was the crystal. More precisely the width of the tension ring. The dial is 31.7mm wide and the internal diameter of the crystal/tension ring is 31.2mm. So dial, movement and movement ring didn't go in fully and the caseback couldn't close fully. I confirmed this by turning around the tension ring (which is triangular in profile). Normally, the flat side of the tension ring faces down and the pointy side upwards. By turning it around, I now have a slightly ugly flat side pointing up and the pointy side downwards so that there's a wider internal diameter for the dial to go in. While I don't intend leaving it like this, I can confirm that the case closes fully. I'll be hunting for other crystals with slightly larger internal diameter. Or, worst case, file away a bit of the tension ring...
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Thank you for your introduction and welcome to this friendly forum. We all look forward to your contributions and continued involvement. If there is anything we can help you with don’t be afraid to ask. Nice clear photos can help a lot.
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