If you do choose to sell it, you may wish to enhance the perceived value with some background history as if the cion were real. You could say it is a copy of a Greek silver tetradrachm of Gela (Sicily), an cxceptional Man-headed Bull on the reverse. The original's weight was about 17.5 grams.This copy portrays Nike flying left to crown horses. On the reverse is written ΓEΛAΣ , the Greek word for Geles, Italy. The charioteer is driving a walking quadriga (four horses) right, holding kentron in right hand, reins in both; Nike flying above crowning horse's, palmette with tendrils in exergue.
Although the Gelas was a Creto-Rhodian foundation of the seventh century BC, the name of the river and later the city is of local Sicanian origin, meaning very cold, as the water is, running from the Heraei mountains to the north.
The rather brutal half-length figure of the man-faced bull swimming right is based on the 'father of all rivers', Achelous, and is clearly identified by the ethnic Gelas as the personification of the river rushing to its mouth, where the city Gela stood.
Some description like (in your own words) that might generate a few bucks more of value.
Don.....