We were recently given an abandoned storage unit. My husband brought this to me and Iāve concluded it āisā an Atocha coin. I see it is not good but silver, and extraordinarily shiny. Which isnāt a great sign, but can I get some help with itās worth, or if itās even remotely real/valuable? Or if Iām wrong all together. Iām planning to take the collections to an expert but thatās cities away unfortunately.