The impression I get, is that the watch has been vigorously worn, and appears to have had little maintenance, if any. You need to have it checked by an actual watchmaker who has access to the parts that might be needed. The movement could be a caliber 565, from the late 1960s. The watch needs a crystal (genuine omega only), possibly a crown, gasket, possibly a rotor bearing gear which wears out on these. Maybe a mainspring barrel, mainspring, mainspring barrel arbor, possibly mainspring barrel arbor bearings, maybe a reverser gear, recondition, etc. Have it checked out, NOT by someone at the watch repair counter in the department store of your local mall who'll farm it out to Heaven knows who, but to an actual watchmaker. Also, stay away from the watch repair kiosk in your mall! There may be recommendations on this MB.
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