Nice find thanks for sharing.
I worked on a couple of money pins while taking over a route for a guy on vacation, and yes, some pinballs did take and pay out coins. What a nightmare. They make slot machines look like popsicles, and you could find them in the 70's here in Reno. Man, the guys who worked on them worked on serious stuff.
I'm sure they had hoppers, and that might be one of the boards from them. All I remember is a harness or two in the top box (backboard) which were as thick as my wrists. So old you could not see much color on the wires.
One of those would be a hoot to play around with. Very interesting machines. I don't know who made them other than Bally.
But then I only had like 20 minutes training on them before I was cut loose to go take care of the rest of the route.