In my search for a case for my Constellation 751 I mistakenly bought a Stainless case with the code 14746-1SC this I have since learned was for a 503 mechanism. Its in good order near perfect to my untrained eye and has the seahorse logo of a seamaster on the caseback, rather than a press on, it's also a screwdown 6 lug fitment. So if anyone has such a movement I'd like to know, I'll try and put a couple of photos on later
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