Hello, I found this recently while detecting on a beach. I used a Equinox Minelab 800, beach setting was (2) wet sand. It was screaming at 15, dug it up and this is what I found. About the size of a nickel.
It is a reproduction Spanish coin, a lot of them out there, they are sold and given away in a lot of places in Florida and some up the eastern seaboard..