That is interesting,
Doing some research on mine one of the biggest differences and the very early ones were if the 8 ball on the play field is an insert or painted.
Mine is an earlier serial number I believe but mine is painted making not the very early run
This is all reading. I have know actual knowledge as bank a ball was built 15 years before I was born.
Can you see the balls though the red stripe? And are the balls even there? That is the odd part to me!
Good luck and keep us informed
Looks like yours may clean up nicely, mine was dirtier than that and with a about a days of work came out very nice. Not perfect but a nice playing game.
Bank a ball is fun and challenging at times.
I either get great games or bad games on it.
I found not having it for free play adds to the fun if you get all of the balls the the 8 ball then you can crack a lot of games. If I was a kid playing this game I would have been in heaven. Getting the specials are what makes the game challenging and fun to me!!’
Edit:: I just reread my post I meant the black 8 ball closest to the flippers.