look at the lettering -- part of "hispan" and on the flipside "carolus" thats shows -- they are dead tip offs -- plus knowing that the spanish 8 reale type coinage was commonly cut into eights -- ie "pieces of eight" is a big tip off --if one knows history its not that hard to clearly see that thats a 1 reale value (1/8th) piece (called a "bit") of a of a 8 reale type of coin --2 bits is a "quarter" of the coin --4 is a half a coin