Its a 17th C token. Farthing size. It's where the expression 'its not worth a brass farthing' came from. They were brass & illegally made by shops pubs etc to plug the shortfall of small change. The Govt turned a blind eye for several years & then clamped down & so they because worthless also many shops would not except the 1 token & wanted several back. They mostly were only exchangeable in the shop of issue, although they started to be traded in their own right. Shops on the same street with agreements to exchange for real money would take other shops tokens, I have also found them at fair sites.
Yours looks like the issuer is Robert Fanvces, the reverse is the bit you need to ID it properly & it starts *IN ??NN PEGES. We need what it said after the 'in' because that is the town or villiage name?