I have a very old coin grek i think it has a female face on one side and a owl standing with aoe on other it l

the coin originally looked like those at coin shows for a couple of dollars i bought one. when i got home i noticed a small bit of a golden color. i took 5 days to clean it propelry distilled water , a special grime remover it sat in 3 days. when i was done it turned out to be solid gold i,m sure it is not bronze, it is a beautiful coin from the roman period as depicted in its face, but the greeks did the same. the owl is standing with very wide open eyes, it looks like 2 or 3 leaves near the owls right sholder.it is heavy as a piece of solid gold this thick would be, it seems to have been hand hammered but all seams are conected beautifully.i may have a winner here any info would be appreciated. thanks whiteswan200000 joe