Add-a-Ball
Machine Details
Manufacturer
Williams Electronics
Year
1961
Technology Era
Electro-Mechanical (EM)
Machine Description
An extremely rare electro-mechanical pinball machine from September 1961, with reportedly fewer than 24 units produced before Williams renamed the design to "Skill-Ball". The "add-a-ball" feature was an important innovation that distinguished pinball machines from gambling devices by extending gameplay without awarding additional credits.