Built in 1948, this is my oldest pinball machine. It's an electro-mechanical pinball without score reels that did not have a conventional shooter-plunger. You would call up the ball with the lower lever, and it would drop into the pocket outside of the machine. Then, you'd take the ball, roll it down the glass top, which was a couple inches short of fully covering the playfield. A second, short glass panel would keep hands out of the opening. The rolling ball would then drop down onto the playfield, supposedly giving the player a level of skill to score points. This was the answer to Wisconsin's gambling restrictions where it became a game of skill (not gambling) rather than a game of chance (gambling, in the lawmakers' eyes).