The Gibson SG is an iconic rock 'n roll guitar in production since the early 1960s. SG stands for solid body guitar. There have been numerous iterations of this instrument over the years. This image is of a 2017 SG Standard headstock. The keen observer will notice this instrument is made for a left-handed player. The instrument is made of solid mahogany with a rosewood fret board. The headstock in inlaid with mother of pearl.