sledworks;
Below is a copy of instruction sheet that Daval furnished with the Non-coin American Eagle/Marvel.
Hope it is readable.
Note that the side key is also used to lock the machine when not in use; when locked, nothing happens when the handle is pulled.
The operator would unlock the machine for a player; the counter would start at 0 and add 1 each time the player pulled the handle.
The instruction sheet says "It will count a total of 60 plays and then automatically shut itself off."
Interestingly, the counter on my Non-coin Comet goes up to 70.
It is really cool that you were able to pick up 3 different versions of the American Eagle in one purchase; and, better yet, they all look (complete?) in original condition.