1977 RICKENBACKER 4001 BASS
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1977 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), dual truss rods, 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 or combination wiring, ric-o-sound input jack plate, pots cavity marking, 3 way pickup toggle switch, chrome bridge assembly including mutes, black Tolex case with blue 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 1977 Rickenbacker serial numbers are:
| QA 19x | 1977 January |
| QB 89x | 1977 February |
| QC 102x | 1977 March |
| QD 144x | 1977 April |
| QE xxxx | 1977 May |
| QF xxxx | 1977 June |
| QG 312x | 1977 July |
| QH 351x | 1977 August |
| QI 403x | 1977 September |
| QJ xxxx | 1977 October |
| QK xxxx | 1977 November |
| QL 519x | 1977 December |