I have an Omega Geneve vintage. I see there is also an Omega Seamaster Geneve with Seamaster Geneve on the dial. Anyone knows of any data about how rare these are and whether they were better quality. I understand that the Geneve models may have been derived from these. I can't find any model numbers in the Omega database to describe the model. Was it just marketing to change the name or was there some special quality that the Seamaster Geneve had that the Geneve didn't?