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1965 Gibson Thunderbird IV reverse body Bass characteristics: Two tone painted headstock, Gibson logo on three screw black plastic truss rod cover, Kluson no-name riveted clover reverse tuners with slot head screws, serial number on headstock back, unbound Brazilian rosewood 20 fret board with pearloid dot fret markers, two nickel pickups each with two phillips head height adjustment screws, nickel pickup cover with plastic shim, white/black/white pickguard with black bird logo, curved ebony thumb rest under G string, three knobs, four saddle adjustable bridge, nickel bridge cover with plastic shims, three phillips head screw tailpiece, CTS potentiometers, capacitor, input jack on body front, strapholder on body back, four screw plastic controls access cover on body back, Honduras mahogany body and neck, standard sunburst finish, rectangular black tolex case with yellow interior.

Gibson records show a total of 87 reverse body Thunderbird IV's were shipped in 1964. For 1964 serial numbers see the "Gibson Serial Number Chart". For more precise dating cross reference the serial number with the instrument's potentiometer codes.