The SG is an absolutely classic Gibson model, first shipped in 1961 and available in one form or another ever since. In fact the SG can be considered one of the cornerstone models of Gibson's range for over half a century. There have been numerous models, typically constructed of a mahogany body, set mahogany neck and a rosewood fingerboard. Differences between the models relate to the number of pickups, and pickup type (single coil P90, or dual-coil humbucker), plus decorative inlays on the higher end models. From the single P90-equipped SG Junior to the exceptional three-humbucker SG Custom, although perhaps the best known models are the two pickup SG Special and SG Standard.
A few other short-lived models using the SG body shape were also available, particularly in the early 1970s, typically aimed at the entry-level market, prices being kept low by using less-labour intensive production methods, alder/maple instead of mahogany, and the simplest single-coil or plastic covered humbucking pickups. Models such as the SG-I, SG-II, SG-III, SG-100, SG-200 and SG-250 are considerably harder to find due to their relatively small levels of production, but will often sell at much more affordable prices than the better known models.
Famous users include Pete Townsend, Carlos Santana, George Harrison, Angus Young, Tony Iommi and very many more.