Hi , probably a variant of one of these:
search (at CHRONO24) :
omega geneve cal 613 meccanico 17 jewels vintage 1970s
Omega Genève Cal. 613 Ω, Meccanico 17 Jewels, Gold Plated 18K, Vintage 1960s
atb Jo
diameter and pics of the back always helpful....is ist hand-wound?
links edited becaus of privacy....
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