A number of cosmetic changes were made to the instrument when CBS purchased the Fender companies in 1965. During 1965/66 the Jazz Bass received bound rosewood fingerboards with pearloid dot position inlays (which replaced the older "clay"-style of the early 1960s) and oval-shaped tuning machines. Block-shaped fingerboard inlays and an optional maple fingerboard were introduced after 1966/67. At first necks with rosewood fretboards received pearloid blocks/binding and maple fretboard necks received black. Fender switched to pearloid blocks/binding on all necks in mid-to-late 1973. Fender also switched to the three-bolt neck "micro-tilt adjustable" neck and the "bullet" truss rod in mid-to-late 1974 before reverting to the more standard four-bolt neck fixing and dot-shaped fretboard markers in 1983. White pickup covers and a pickguard/control plate were introduced the same year. In 1986 Fender introduced the Japanese-made Fender Performer Bass, also with micro-tilt neck, designed by John Page and intended to be an Elite version of the Jazz Bass; however, the radical styling was not popular and production ceased the same year.