Here is another junk box rescue. I thought it has enough identifies but I am not seeing the correct coin. It is silver, about 19 mm in diameter (you can see it is not perfectly circular) and heavily worn. On the oberse I can make out "1816." I can make out "HISPAN" on the reverse, and a "D" at the 6 o'clock position. On the left I see, "R. A. G." I think, it could be I. G.

