Paid 10 bucks it was a bunch of coins in a bag , about 15 of them , that is the back of coin I believe if you look at it , it has a horse with a person mounted on it with a crown on their head
"Medieval silver brabantinus of John I, Duke of Brabant and Limburg (1267-1294), Walt type Mayhew 1b or 1c, probably minted at Brussels, c.1270-1282 AD"