Fender introduced the Precision Bass (P Bass) in 1951. The P Bass was the first electric bass and was a smash hit. The Precision bass included a slab double cut away ash body, a single coil pickup & a one piece 34" neck (Maple). The early P Bass also featured large Kluson tuning machines heads which were later replaced by conventional geared tuning machines. In 1957 the pickup was upgraded to a split double coil pickup and a wider headstock was added.