Mark, i'm not an expert but this might be some sort of gaming token.
Search for " Ciondolo Doblone Uncharted 4 " and " Captain Avery doubloon "
The doubloon was a two-escudo or 32-real gold coin, weighing 6.867 grams in 1537, and 6.766 grams from 1728, of .917 fine gold. Doubloons were minted in Spain and the viceroyalties of New Spain, Peru, and Nueva Granada. Wikipedia
Hi Mark --
Manfred's right. It is a modern souvenir or novelty associated with (as I understand it) a game called "Uncharted." Pretty cool looks. See:
Collectors collect things like this. I wouldn't be surprised to see one like the one I have pictured sell for $10 US dollars. Yours is in worse shape than the one shown, so it would be less.