Trough Opto Transmitter / Receiver Board Set (4 Ball) For Williams/Bally Pinball Machines

This opto trough board transmitter replaces A-18617 & A-18617-1. 4 ball trough opto transmitter and receiver board set. These boards come with new rubber grommets and metal spacers. Supported Game List: Attack From Mars Cactus Canyon Champion Pub Cirqus Voltaire Congo Dirty Harry I500 Jackbot Johnny Mnemonic Junk Yard Monster Bash Medieval Madness NBA Fastbreak No Fear Revenge From Mars Safe Cracker Scared Stiff Star Wars Episode 1 Theater of Magic Tales of the Arabian Nights Who Dunnit Williams reference #A-18617-1 & A-18618-1.