Overview
"Expo" is a two-player electro-mechanical pinball machine released by Williams Electronic Manufacturing Company in October 1969. Designed by Norm Clark, with artwork by Christian Marche, the game features two flippers, five pop bumpers, two slingshots, three standup targets, and a kick-out hole.
Williams released an add-a-ball version in the same month called "Roto", allowing players to earn additional balls instead of replays.
