I bought the watch second hand and I've never had the watch opened so no idea what serial # it is.
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I don't know the exact year of the watch. It has the early 'straight' "First watch on the Moon" text and the dial has the stepped minute track so I assume it's a 145-022-69 or 71 because, I think, by 74 didn't the dial loss the stepped outer track and the case back became something like the current models.
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