I'm keen to get some thoughts from the experienced collectors here about how necessary it is to get photographs of the movement of a watch before buying online. I guess any reputable "professional" dealer should be expected to provide movement photographs, and not to do so would be a bit of a red flag. But there are plenty of amateurs selling on eBay and elsewhere who are unwilling or unable to provide photos (perhaps they don't have the tools, the right knowledge etc.).
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