Could buy a whole vintage GMT https://www.ebay.co.uk/itm/Rolex-Ra...h=item2ce2cf1078:g:j4MAAOSwXyBcM-4e:rk:5:pf:0Purchases made through these links may earn this site a commission from the eBay Partner Network
The sellers username on eBay is "original.vintage". At least we do know now, that it cannot be a fake!
The price is that high that it totally justify an investment for a production of perfect fakes... Rolex vintage world is very hard nowadays
Fake or not fake, if you put this on a generic 1675 it will not be a correct "blueberry" ... just a created fantasy piece. Only fakers buy something like this.