Bally issued a kit to convert any of the first 8 electronic mechanical chime games to electronic
sound chimes. It was kit K-525 that had a replacement back box cable, sound board, and all
mounting hardware. Bally F.O. 608 was the the procedure for installation of the kit for the conversion
to electronic chimes. The speaker placement on your game is where Bally specified it in the
instructions. I don't think many games were converted this way but it was an option for operators.