This unit in the back box thats numbered 0-37 and has a little square hole that you can see one number at a time from the front glass, it never moves are does anything but this old Williams em game apears tp play ok without it, evidently not.
So whats the set up for this or a test for it. Ive never seen it change numbers the first time but the game goes from player 1 to player 2 perfect it seems and the score reels count every point. I have the schematic but it could take me a week to figure it out if not longer. This unit has been cleaned and nothing is froze up, and both coils work, im not aware that either coil has fired, I manually checked them with a proper voltage supply.
Thankyou.

My photo ability was on my other computer, lightning killed the computer, so it could be a while before any pictures.
I use dimes to fire off this pinball machine, one dime gives me one player for 5 balls, 2 dimes gives me a 2 player game with 5 balls each, all of that works.
No manual is available for this machine.

This may help, it does have a little tag on this unit and it says replay unit.

It never moves or does anything, the factory tag says replay unit. This game does have ways to set it up but since it works ok the way it is I haven`t tried those yet.
I waited to last to try to figure out whats up with this unit.

OK thats it, the game is Williams Casanova, mfg. late 1966 into very early 1967. I was told you can`t purchase a manual because none exist, so I will have to figure out part of this game.
I may be able to figure out what this replay unit does by looking at the schematic but it may take a long time. I do know that both coils are good and the switches are clean and apear to be in good working order. Now one of the springs apears to have been stretched.
What I need to know is what needs to be done to check this unit out for proper operation.
Thanks.

Ok the game does start by pressing the red start button without the need to add coins, if you press the start button once you have a single player game, if you press the start button twice, you have a 2 player game.
I noticed the replay unit showed 10 in the window and now it has stepped down to 2, so I guess its working now.
I have no idea what changes were made but thanks for the help.