How to: Size a Watch Crystal When the Original Crystal is Missing

Someone asked me how I size a crystal if the original crystal is missing. I answer this question here. The question/comment was left on the following video that describes how to change a watch crystal step by step:
   • How to Replace a Scratched or Cracked...  

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I'm Colin Potts, owner of Watch off the Cuff in Milton, ON Canada, a boutique watch repair company that repairs watches, sells new and vintage watches and watch parts, and also provides technical resources, watch articles and more:
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