I made the mistake of buying a JC120 when I was a teen, in a way, I can thank it for leading me to the V4 that I bought next.
The JC120 has, perhaps, the worst onboard distortion I've ever heard. Mine did have a paisley grill cloth though.
Sadly, I don't have that Ampeg anymore. I think I'd give Nicholas the Roland, if I still had it.