Beginners often ask about where to find this or that crystal, as it happens replacing is cheap and easy as long they are just flat round ones. But the crystal may not be found as generic, or can be expensive, or hard to find. So good old polishing is needed. Here again my technique key points: Crystal mounted on case, that will make it so much easier and safe to handle. Caseback removed, check below why. Jeweller's motor or other rotary tool with a fixed stand. You really want a s
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