Gottlieb system 3 MPU for Operation:Thunder?
MA-1423 or the MA-1934 Downgraded for Operation Thunder.
The 1423 runs:
Silver Slugger, Vegas, Deadly Weapon, Bell Ringer, Nudge-it, Title Fight, Car Hop, Hoops, Surf 'n Safari, Cactus Jack, Class of 1812, Operation Thunder, Super Mario Bros, Super Mario Bros Mushroom World, Cue Ball Wizard, and Carribean Cruise
The 1934 runs:
Street Fighter II, Tee'd Off, Gladiators, Wipe Out, World Challenge Soccer, Rescue 911, Freddy, Shaq Attack, Stargate, Big Hurt, Waterworld, Strikes 'N Spares, Mario Andretti, and BarbWire