A clever and accurate baseball simulation game, patented by its inventor Leonard D. Kroff in 1923, utilizes an unusual mechanism to determine the outcome of each play. Place a marker on home, representing a player at bat, and press the spring-loaded button to spin the hidden cylinder. Varied results will appear in the view window, indicating whether the player got a hit and made it to a base, or whether it was a ball or a strike. Complex instructions printed on the back help game players understand baseball's basic plays. The machine simulates an actual game surprisingly well.