Kluson Deluxe tuning keys were widely used on entry-level Gibson and Epiphone guitars throughout the 1960s, and into the 1970s. There were three versions; all nickel, with enclosed gear but varying pegs: the Kluson 301-V (also described as the MH-301V in the 1965 Gibson part list) had unplated brass posts/ivoroid oval buttons; the Kluson 303-V / MH-303V nickel plated posts and the Kluson 307-V nickel plated throughout. Models using these tuning keys include the Gibson Melody Maker, SG Junior, SG Special, ES-120T, ES-125, ES-140, ES-225, LG1, L48, B25, J45, J50, Epiphone Granada
Gibson part numbers 82537 and 82548 (Gold plated). Schaller M-6 tuning keys were used on numerous Gibson guitars including the SG series, Les Paul series, and quite a few hollow body (ES series) guitars.
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