The hands definitely aren't typical of the 7923 - but this is exactly what is making me think it is a unique version of the watch, possibly a prototype? Because the serial number is previous to the $100,000 ebay watch, then this watch must have been made earlier, and the ebay watch itself isn't a typical 7923 in the first place - so this could be even more atypical. And with reagrds to the dial, I think it might actually be completely unique among all Tudor Sub-mariners - because what other watch has that exact wording and in those colours? And if the dial is completely unique for a 7923 (or any watch), then why couldn't the hands be unique for a 7923 too?