I might have a few classic stern knockers. Have to check the work shop this week.

Early Bally & Stern electronic pins are my specialty for repairs & new playfield installs. I have worked on hundreds of them for over 25+ years, & continue to work on very old to the newest pinball machines. Also the other local tech does powder coating, cabinet painting, repairs, etc. We are local to Classic Playfield Reproductions for your restoration needs. So if you are in Canada, & searching for other shops for repair or restoration work. Reach out to us if you can ship your pins or parts in for service. I also order new tempered glass from the manufacturer to upgrade games, & you could get extra when your game ships. Depot to Depot is cheapest, but you can get lift gate on your end if you need it!