Pinball Switches - Fixing, Adjusting and Cleaning the Right Way
I recoded my Stern Stars (1978) by replacing the processor with an Arduino Nano, and created a generic Bally/Stern OS you can use to make new rules for your early SS Bally/Stern
Pinitech UNO Bally / Stern Pinball Display - Pinitech.com
Bally 2518-32 Sound Board - U9 LM741 -
Pinitech UNO Bally / Stern Pinball Display - Pinitech.com
PINBALL: Twilight Zone Slot Machine Switch Modification
Bally - Game specific items • Ministry of Pinball
4-Button Diagnose Service Baugruppe Williams/Bally