Hi everyone, I've posted quite a bit over at OmegaForums. This question is more suited to this forum though. I've looked at King Seiko for quite some time now. I particularly like the 4502 types that are true high beat 36000 bph with the gold medallions on the back. I think I have a feeling...

I notice something strange about the King Seiko 5626 and the case back medallion. Somehow not all of them have the medallion. Even the chronometer versions don't necessarily have it. What's up with that? Did it depend on the production year or something?