Can be used on R-88, 89, 90 and other vinyl jukeboxes of a simlar age. Please check the connections in the top left corner - as some were square, rather than rounded. This model has the SQUARE connectors

6-09931-01

6-09931-02

6-07438-04

6-07438-06

Tested and fully working.

Untested ones are also available, but may require servicing and repair,