What's the diameter? A Farthing is 25 mm. A Penny is 36 mm. and a Half penny is 32 mm. I wonder if the Obverse is in better or at least more legible? If you get a chance post a scan and i'll see if i can help. Also the weight and the rim are good indicator's, if it's reeded, or plain with an inset reeding, or even if the edge has any lettering. Let me know, I do what i can. Rember a coin actually has 3 side's.
Obverse, Reverse, and the rim. So much for the old "Clique" There are two side's to every coin...lol..
Cool find, ozzysdad........