Hi Ilayaraja --

You have a modern reproduction of an ancient Greek coin. The owl is prevalent on coinage from the city of Athens.

A genuine coin is pictured on this page:

https://coinquest.com/cgi-bin/cq/coins.pl?coin=15784

Yes, Ilayaraja --

There is a market for fake coins. Their prices are, of course, very low compared to genuine coins. Here is an example:

https://www.ebay.com/itm/Vntg-GREEK-GODDESS-ATHENA-OWL-AOE-TETRADRACHM-COIN-TOKEN-Faux-/164455121769?hash=item264a4a0369%3Ag%3ABXAAAOSw7RJeo0lK&nma=true&si=%252FvjiC0UNJFCT8z%252FHTiQTj87fc2Y%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557

Your Greek Athena coin might sell for $10 to $20 US dollars to a collector of such novelties.

Go on eBay and look for coins sold with 'replica', 'reproduction', or 'faux' in their titles.