Need some help. I have been searching for some time now for a part for my pinball machine. i need a game lock relay. It uses coils Z 27 1000 and M 29 1000. These are Williams parts and readily available. Its the metal unit that attaches to the board. Hoping someone can direct me to a source for parts or ideally someone has this part which I can purchase.In he photo it is the lower unit that I need

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Contacted pbresource, awaiting their reply. Bonzo71, the plate plates misalign ad the spring is worn out.......Hoping someone has a Zaccaria game of the era (1976) and I can find the unit.

pbrsource does not have the unit I need. `

I tinker with the machine but don't feel confident doing my own rebuild. The metal bracket is good as far as I can see, the plastic plates don't pull in or align properly. First suspect is the spring. (?)
Or maybe I should be looking elsewhere? When a game is started the ball index is all over the place. It for the most part plays one ball and game over. It will register two or three balls at the start of a game, but goes to game over when the ball drains out. A tech who looked at the machine suggested it was the game over relay. Am I looking for the right thing?

I have the original schematic. Quite large, Scan in pieces? It's a bit faded in parts for being 40 + years old

I can check. I don't know that they will.

Thank you Howard R for the info.I will try your suggestion

Pinwizkid contact Bonzo71, he provided me with a pdf scan. I don;t want to copy and distribute his material without his permission