I have 5 chips I aquired about 10 years ago and have no clue as to there beginings, can some one help me. 3 are black clay, with the right sided horse stamp around the perimeter on both sides, one side has gold embossed fancy lettering in the middle of JHB, other side has $25.00. 2 are ivory colored with again the horse stamp on both sides and gold embossed fancy lettering on one side of JG, and the other side of GG.