Getting information on vintage Movado is not an easy task. The current company is pretty much useless when it comes to non-quartz watches.
There is only one source I know of to assist with old Movados:
https://movadolookup.wordpress.com/
You are going to need the inside of the caseback, which will contain the case reference and elements of a serial number. A table will match the caliber to the reference. A separate table has information on dates for each movement caliber.
An inexact science at best, but it is all we have.
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