Unfortunately, with the abundance of information available on the internet, if is all too easy for people to find out how to take the movement out of its case. Whether this is simply to play with the watch or to photograph the dial, who knows? They are not toys and I would not even take the back off of one of my watches after it had been serviced (until its next service)
I went to see one watch recently that the seller had photographed out of its case and when I pointed out a particular issue he said, "that must have happened when I dropped it as I was taking the movement out."
It's like all of these things, if you don't know what you're doing; don't do it.
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