Case polish looks minimal, what you're looking for is sharp bevels on the lugs on the Carreras. I'm not sure the crown is original - large unsigned crowns were correct for earlier 2447s but I've never known them to be found on 3647s. Otherwise, the dial looks all right. I'd want to know what the serial number is before buying (lower = more likely the crown is OK) but my biggest issue with this is that it's overpriced by at least 100% - similar condition examples of these have been selling in the US $4k range lately.