There is no « Swiss » visible on the Omega picture of the reference
@OMEGuy posted above. So maybe in both cases it’s hidden by the bezel and the curve of the crystal?
Also one cannot exclude, for watches that are mass produced, that slightly earlier dials stocks are being liquidated or used on some examples of a given reference. A late 50s dial can have been placed at the factory on an early 60s watch.
pS agree it’s a beautiful dial.
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