The checkerboard side is the obverse and the cross side the reverse. The checkerboard is actually two pillars (of Hercules) symbolic of the straights of Gibralter, gateway to the Atlantic. Two lines separate three lines of text from top to bottom: "L" / "1" / ? then ?LVSVLTRA then "V" / "89" / "L" meaning mint mark / denomination (in reales) / assayer (missing) then PLUS VLTRA then Assayer / last two digits of date 16 "89" then mint mark. If the legend around the rim were visible you would see CAROLVS II of which only "...VS I..." is half visible. The reverse with the cross include clockwise from the top denomination / assayer /last two digits of date / mint mark. A bit of the legend is visible with "NIARV" of HISPANIARVM. So in total this coin has (2 of 3) denominations, (3 of 3) mint marks, (2 of 3) two digit dates, and (1 of 3) assayers with not quite half the outer legends present. Always start reading at the Kings name. The reason for so many opportunities for the same information is that the cob blanks were irregular bits of silver often not well struck up. Coins with everything present are rare presentation pieces. Your coin was listed at 60,000 Spanish pesetas in contrast to the same coin from assayer "R" at 14,000 pesetas. The circular cut is post mint damage that drops the value somewhat. Without the damage I would estimate the value at about $125 retail. As is closer to $60 retail. If you paid less than about $45 then you got a deal.