Availability Touchmaster Infinity Dolphin Board $45.00 Qty: Add to cart Email a friend Question about product? Add to wishlist Details Midway Touchmaster Infinity arcade game "Dolphin" circuit board. This board is good condition, it is untested and not something we are that familiar with. Original part number is: 04-12818.6 and it is listed as a Dolphin board in the game's manual. Sold as-is.