Gilt chapter ring Tudors go for five figures, easily. Jacek has a 7928 on offer at $13,350. Swapping out the dial/hands will make it practically worthless to collectors. Just don't do it.
Get your friend to take it off that dreadful bracelet and at least wear it on leather until he can get an Oyster for it. It's the wrong bracelet and the wrong lug width, which could well damage the case.
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