Congratulations on your purchase!!! This Geneve' model is no ordinary Geneve' model. From the gold hallmarks, it is made and cased in Switzerland in14k, possibly for the U.S markets.. Most of the Geneve' models of this vintage that have come through my hands in the past 35 years were cased in the country of where they were sold. For example, in the UK I found most Geneve models that came through had Dennison Hallmarks and "Made in England": stamped in the case back with ).0.375 meaning 9K for British mainstream gold. When I resided in Australia, I came across to the same model with no hallmarks apart from the 0.375 with 9K and the Handley stamp ( which was a case made in Melbourne) . They were also used as 25th anniversary presentation watches by some companies to their employees and I had one exactly the same with the last being 1973.
My understanding from this was that the movements were imported and cased in the country of import for obvious reasons of import duties.
Most Geneve' models were good value for money as they had the same great movements used in other omega lines, but in economy cases making them great value for money. The name "Geneve" was discontinued possibly in the mid 1970's which in my opinion was a nice name line to Omega. It sort of makes it feel like Patek Phillipe Geneve.
Some plated models were absolute crap as the plating was so thin that there was erosion and corrosion of the brass near the crown and the opposite side where you could just about see the case threads and most of the dust and moisture would creep in. Enough venting from me!
Great find and enjoy in good health!! Thanks for sharing