Sega Bells are often found set up for US dollar cents (usually 10¢) as many were sold to US military bases across the pacific. It is thought that Sega Bells, like later slot machines and many of its rivals, were often bespoke units built to suit a customers' needs, so very few machines can be considered identical in terms of aesthetics. It is thought that Service Games would take High Top machines in need of repair, would manufacture replacement parts in Japan then re-brand and re-sell as Sega Bells (or alternatively, manufacture full units using the High Top design). The Sega Bell is thought to be an unlicensed clone of the High Top slot machine, manufactured by the Mills Novelty Company (later Mills Bell-O-Matic) from the late 1940s.

It is believed to have originated from either 1956 or 1957.

The Sega Bell is a brand of slot machines in the Bell series sold by Service Games, Japan.