Coin Values

The coin in question is a Ludovico coin from 15th-century Milan. An authentic gold specimen is probably worth thousands of dollars depending on condition.

However, the specimen in the images looks to be a copy made for jewelry. Authentic renaissance pieces are nearly impossible to find in such good condition. The minting also looks too precise for it to have originated in 15th-century Italy.

If you want to be sure you could take it to an ancient coin specialist.