Quoted from peclark:
That is a beautiful machine! How does the diamond in the middle of the playfield work?
There is a popper that shoots up a ball representing the batter when you start the game. Hit a single, the field turns and puts the ball on first base, double second base, etc. and the runners advance on the backglass (lights) too. Hit a home run and the bases clear. Very cool and mesmerizing effect - I keep trying to catch the game "get it wrong", but the balls/runners on the playfield always match what is shown on the backglass. Fun seeing runners on 2nd/3rd, hitting a single and watching them score.
Cool touches on the backglass too - if you tilt, a picture of an umpire signaling that "You're Out!" is illuminated. And the pictures don't show the missing instruction card on the right for which I have a repro.
The reverse kickers on the top third of the PF take getting used to, but you can really get the pinball going between the two Single When Lit bumpers at the top and/or in the top kicker saucer.
This is actually the second ML I've had - found one in a Pensylvania warehouse about 20 years ago and don't remember paying much for it. Donated it to a fellow Pinsider who has a great collection of baseball pins after I got this one. From the two serial numbers we guess that there were at least 1500 made.