Let's Play...

I've posted this on the Lead Adventure Forum's Mediaeval board, but thought I might spread the net a little wider (by about twelve people perhaps.) A family member has unearthed these figures - a chess set from the mid to late Eighties cast in metal (by the soft appearance I'm guessing a lead alloy as most figures were cast in back in the day), but neither of us know what they are meant to represent or who made them.

Anyone out there have an idea?