Hye Jason,
There is basically nothing on the net about these you were ever more lost than me with no make or model, I found one fellow who has like 4 but his got ruin in a flood.
I might have posted this in hast, besides the coolness of you finding one like yours....after the post I removed the rectangle bracket repaired the stud that got pulled out cleaned and reinstalled it and it works just fine, the right winding of the string was important and mine tried your trick of winding the wrong way, but I knew that issue from working on my old crank diggers.
On my super scooper you deposit coin and the back arrow lights, it goes out when you hit the back button and stops when you stop pressing it, then the right button lights, same thing it is done when you stop pressing then it automatically goes down to try for a prize and returns to the prize dump hole.
I played it 8 or 10 times no issues, well, I will have to replace the string soon it's badly worn at the top and the lamp up inside there has a bad ballast but I will sub that out for some funky LEDS or even neon I have around.
I had the rheostat all the way one way and the scoop never closed all the way the other way might snap a finger off, lol....so I have to find a happy middle,
I really love this design, so simple, the power supply is a huge overkill, I really wonder what year they came out, I am guessing late 70's early 80's with no IC chips it's just darn cool to me, more fun to work on for me like old pinball.
Newer cranes have all kinds of settings for the clamping even during one game these super scoopers really have a sweet skill factor to them being the same each time,
I don't think I will putz with it modding it anytime soon but it might be cool for the claw to open and close slower not snap open snap close.
Cheers,
P.
( Bats )