Williams/Bally Round Stand-Up Target Rear Mount with diode included and installed.
Williams/Bally reference numbers:
A-14690-4 or B-11854-4- Red (Used in Bride of Pinbot)
A-14690-5 or B-11854-5 – White (used on Terminator 2).
A-14690-6 or B-11854-6 – Yellow (used on Star Trek; The Next Generation).
A-14690-15 or B-11854-15 – Orange (used on Terminator 2).