This Is the Coil stop bracket found on the Pop Bumper assembly.(See Photo Gallery)
It truly does serve two purposes, as a coil stop bracket, and the Pop Bumper yoke retaining bracket.
The screw mounting holes are 3/8″ on center. This is your fit measurement!
Fits: William-Bally-Data East-Sega-Stern (Both early and new)
These are older, and made from stronger metal, than what you find on todays pins.
Does not fit Gottlieb.(Screw mount holes are 5/8″ on center)
These are most likely used, but they have been cleaned in a ultrasonic cleaner, and fully functional.
Stern (old): 1A-123
Data East / Sega / New Stern: 535-5277-00 & 535-7347-00