I believe they are used on bally and other machines.
Chrees Controller Module, 20A Relay Strong Load Capacity 4V 40V DC Voltage Regulation Low Power Consumption, with Copper Terminal Optocoupler Coupling, for Automation Supplies
New C11998 24 Volt Relay board for Bally/Williams Sys11 pinballs
Williams Bally 12 VDC Relay Board - New Old Stock
NZXT Relay SwitchMix PC Gaming Headset Stand & Audio Mixer - AP-USMSM-B1 - Seamless Switching Between Headset & Speaker Audio - Studio-Grade Mixer - DTS 7.1 Surround Sound - Black
Xiuganpo Spring Return Joystick Switch 2-position Rubber Sleeve Cover for Magnetic Starter Contactors Relay
Momentary Remote Control Switch SRemote Control Switch With Relay 7A 12V
