Jimi Hendrix and Otis Rush flipped their right-handed guitars over and played them lefty. Steve Miller flipped a lefty over and played it righty. They all certainly helped to popularize the look of the upside down headstock, but none played a true “reverse headstock”, with the orientation of the headstock intentionally mismatched to the body. So who was the first player to do it? And which guitar company was the first to offer it as original spec?