1978 RICKENBACKER 4001 BASS
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1978 Ric 4001 features include cresting wave shaped headstock, Kluson riveted tuners with slothead or phillips head screws, black plastic bushings and shims under the tuner plates, raised logo on plastic truss rod cover (plexiglass on left handed models), smaller triangle pearloid fret markers, neck through body design including skunk stripe, 20 frets or fretless option, white or black binding, four pole neck pickup, four pole bridge pickup including cover and chrome surround, white or black pickguard, heptagonal shaped knobs with silver top and lettering, CTS potentiometers, yellow capacitors, plastic wiring in control cavity, ric-o-sound input jack plate, pots cavity marking, 3 way pickup toggle switch, chrome bridge assembly including mutes, black Tolex case with blue, orange or black interior.
The letters on the chrome input jack plate determine the year and month of production. The digits indicate the number of production. Some examples of 1978 Rickenbacker serial numbers are: