The more I look at the dial, the more I wonder if the lume is correct. This kind of hour markers usually comes without lume - at least without lume ON the markers! - and I am wondering if someone changed the dial and added some lume to match the hands - or changed the hands, etc. Maybe, as Hoipolloi suggested, someone cleaned the dial and add some lume on the markers. As the dial is correct and looks correct for the reference, I would chose the last hypothesis.
I could be too suspicious though, and with old Omega dials, almost everything is possible!
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