As everyone knows, the SG was originally a double cutaway version of the Les Paul model. Les Paul didn’t care so much for the new style and his name eventually got dropped to be replaced by the SG label(as in Solid Guitar) in 1963. So the 1961-63 transition model, sometimes referred to as a SG Les Paul. It is technically not a SG yet, even though it looks, smells and taste like one.
The SG custom is the top of the SG line. Until 1969, the only finish available was white. Three humbuckers that drool 60s heavy rock. No less than four tailpieces variations can be found on the SG Custom: Bigsby (61-63), Sideways Vibrola (61-62), Short Vibrola (62-63), Maestro ‘lyre’ Vibrola. Hear Phil X get High on it