The Charvel Model 1A1S1H is a (super)strat guitar made in Japan in the eighties by the company Kyowa - Shokai under contract by IMC (International Music Corp). Grover Jackson chose a pointy headstock design that was popular among a new generation of guitar players. The Charvel Model 1A1S1H is like the Charvel Model 1A but has one humbucker and one single coil, hence the name 1A1S1H. . The neck was a Quarter-Sawn maple neck, with a compound radius 12"-16" maple finger board.