1938 Stoner Chubbie. We have one at a location I work at and it's a lot of fun for a flipperless game.
Here's a picture of it when I brought it home to work on it. You have to hit the 15 bumpers to unlight them. Once all are unlit they all relight and every bumper hit scores 2 points that are indicated by the center of the backglass. Hit the lit green #7 bumper to release an extra ball.