Pool

Pool is a solid-state electronic pinball design from Williams Electronics Games (model number 569), but it was never put into production under that name. Instead, the design was reworked and released as Bally's 'Pool Sharks,' making Pool essentially an earlier working title or precursor concept rather than a standalone released machine.

Because no units of Pool itself were manufactured, no independent rules, artwork, or gameplay documentation survives for it under this name. Its significance lies primarily in its connection to Pool Sharks, illustrating how Williams and Bally (both under the WMS Industries umbrella by the mid-1980s) sometimes shared or repurposed game designs across their brands.

For collectors and historians, Pool is best understood not as a lost or forgotten production machine, but as an internal design step on the path to Bally's Pool Sharks.