Williams/Bally WPC-95 black backbox hinge set.
Used on the following games:
Attack From Mars
Champion Pub
Cirqus Voltaire
Congo
Indy 500
Jackbot
Johnny Mnemonic
Junkyard
Medieval Madness
NBA Fastbreak
No Good Gofers
Scared Stiff
Tales of the Arabian Nights
Who Dunnit
Williams/Bally reference numbers 01-9011.2-R & 01-9011.2-L.