This seems to be an A. Zildjian 20" ride cymbal - 2184 grams - made for Manny's music store with a "Manny's" stamp. It is well known that Zildjian made private label cymbals for Manny's. I believe that this one of them and is from the 1960s.
It is in very good condition and has a good amount of patina - I did not polish it. There are a few relatively minor ripples that seem to be part of the original factory manufacturing and do not appear to be any sort of damage. $65 plus shipping from Southern California to the lower 48 U.S. Sates. No international shipping. I accept PayPal as a "gift".
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