I recently purchased a 1969 Irving Kaye coin operated Foosball Table. It originally had a glass top, and there is a mechanism that delivers the ball to the middle of the playing field when you turn a knob on the side of the table (the ball then pops up in the middle of the playing field).
Everything is working well, BUT it looks like it's missing a part that would close the hole in the middle of the field after the ball pops up. Please take a look at the pictures and let me know what you guys think.
Any help is much appreciated!