About this era and style of Boombox....
The Lasonic's: 931, 975 ect, the Helix 4700, the Rexcel, the J1's, the Wheely's all used a manufacturing technique that placed the graphics UNDER clear plastic. That plastic has held up really well over the years. The graphics and colors show no signs of fading, they are virtually scratch resistant and when a little wax is applied, they shine up like a new penny!
This example right here shows what some time and effort can really do.