Product ID: A-17986
Williams/Bally Bell Armature (Plunger) Assembly A-17986

Used in the following machines (may not be a complete list):
Cactus Canyon
Cirqus Voltaire
Congo
Flintstones
Revenge From Mars
Theatre of Magic
Tales of the Arabian Nights
Who Dunnit
Williams/Bally reference #A-17986.