Zappa’s most infamous “SG” was not actually a Gibson at all. What has become known as the Baby Snakes SG was actually a copy.
“We were working down in Phoenix, and this guy came to the dressing room after the show with this guitar he’d built and wanted to sell. He had copied a Gibson SG except he’d added one more fret so it went up to an E, and it had an ebony fingerboard, humbucking pickups, and some inlay, and some real nice woodwork on it. He wanted $500 for it, and I thought it was a real nice guitar, so I bought it.”