This is the first SS game to have a disappearing pop bumper. Several EM games have this feature. The first one is Williams' 1958 'Gusher'. This is the only Williams pinball machine with its dot matrix display mounted "on" the playfield instead of in the backbox. The only other pinball with the DMD mounted on the playfield is Capcom's 1996 'Flipper Football'. The neon tube was produced in a variety of colors. Reportedly, the menagerie ball was also produced in a variety of colors, usually matching the neon's color. The sample game pictured in this listing has several playfield differences from the production games that followed. Click here for a list of these differences, with pictures.