1845 Mexican Coin? Thanks For The Info

Ostensibly from the Zacatecas mint. Some aspects don't look quite right to me. However, in this era, while forgery was rife, the details of even genuine coins were variable. Weight and specific gravity should be definitive diagnostics. The manner in which it's holed is intriguing. If authentic, in this condition value will not be too much in excess of melt. It might actually be worth slightly more than that if shown to be a contemporary counterfeit.