ID help needed for greek silver coin

I have had this greek silver coin since the 1970's. Someone told it was from Corinth. Can anyone let me know if it was minted at Corinth or one of its colonies and the approximate period when it would have been minted?
Thanks
Mark

Thanks
Mark


NO END IN SIGHT LIB $2.50'S CAC ONLY
https://www.pcgs.com/setregistry/gold/liberty-head-2-1-gold-major-sets/liberty-head-2-1-gold-basic-set-circulation-strikes-1840-1907-cac/alltimeset/268163
https://www.pcgs.com/setregistry/gold/liberty-head-2-1-gold-major-sets/liberty-head-2-1-gold-basic-set-circulation-strikes-1840-1907-cac/alltimeset/268163
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Comments
The small "unbent Q" shape beneath the Pegasus is the archaic Greek letter qoppa; the city's name was originally spelled with a qoppa in the local Greek dialect, and qoppa remained the abbreviation for Corinth even after the letter became obsolete in ordinary use. Indeed, the Wikipedia article on the letter qoppa uses one of these very coins as an illustration.
Corinthian colonies and some neighbouring states copied the Pegasus design, but substituted their own abbreviation letters for the qoppa.
The Wildwinds page for Corinth has some more examples of coinage from this city, for comparison.
Roman emperor Marcus Aurelius, "Meditations"
Apparently I have been awarded one DPOTD.
Mark
https://www.pcgs.com/setregistry/gold/liberty-head-2-1-gold-major-sets/liberty-head-2-1-gold-basic-set-circulation-strikes-1840-1907-cac/alltimeset/268163