Manufacturer Midway

Extra Bases 4.5" Trackball Optic Assembly

Optic board, roller, encoder wheel and brackets

Original Midway 4.5" trackball optic board and related parts that we believe was used on its Extra Bases and Bowling Alley arcade games from 1978. Listing is for the items shown, including an optic board (part #A082-91323-E000), encorder wheel, roller and metal brackets.  We do not have any other items.  Parts are untested, sold as-is, but in good condition.

See pictures for more details on its condition.

Year 1978
Related Game Title Extra Bases
Related Game Title Bowling Alley
Quick Game Facts
Extra Bases

Early baseball game.

Screen Captures

Coin-Op Technical Details
Year: 1980
Manufacturer: Midway
Genre: Sports
Players: 2P
Conversion Class: unique
Orientation: Horizontal
Monitor Resolution: CGA