JW
Welcome to the Forum and I hope that your restoration project goes well. I assume from the case ref and from your illustration that this is a front loading unishell case which has a split stem on the crown. Are you sure that the watch is gold plate and not gold capped? For the steel case version the Omega Vintage Database does illustrate a crown very like your first example, so the Ofrei one is a puzzle. There are a lot of people here who are expert on these 1960s Omegas and they will probably have the answers you seek.
Good luck with it!
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