*Practical* acceptable amplitude expectations for a vintage watch
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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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Pry as usual only place a piece of thick paper or cloth on the case underneath your pry tool the paper will cushion and prevent scratching. Some back plates ,by design, are to be pressed with pressing tool. There are pressing tool of different quality at various prices, and undoubtedly relevant discussion on WRT forum. Usually watches get ruined by watch repairers. Rgds
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Search for watch case vice, something like these mine is like the 55mm diameter one. https://www.cousinsuk.com/product/hand-or-vice-held for the case back search here for crystal press, here is a good thread about one with a review video too. Tom
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