A very nice Bally lamp driver board, AS-2518-14 as used in many early solid state machines.
Pinball Machine - Lamp Matrix Test PCB & Cables
Williams Pinball Machine lamp board socket 5 bulb A-14978
Williams Pinball Machine lamp board socket 6 bulb A-14846 pentagon
Williams Pinball Machine lamp board socket 5 bulb A-14848
Williams Pinball Machine lamp board socket 3 bulb
WILLIAMS / BALLY PINBALL MACHINE WPC-95 A/V BOARD
