For photos, click on the links below:

1976 4001-S features: Cresting wave shaped headstock, Kluson riveted tuners with 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, glued in 20 fret neck with skunk stripe, dot fret markers, no binding, four pole neck pickup, four pole bridge pickup including cover and chrome surround, white plastic pickguard, four black heptagonal knobs, CTS potentiometers, plastic wiring in control cavity, 3 way pickup toggle switch, yellow capacitors, chrome bridge assembly including mutes, mono input jack, pots cavity pencil marking, black case.

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 1976 Rickenbacker serial numbers are:

PA xxxx 1976 January
PB 143x 1976 February
PC 209x 1976 March
PD 290x 1976 April
PE 396x 1976 May
PF 474x 1976 June
PG 504x 1976 July
PH 585x 1976 August
PI xxxx 1976 September
PJ 709x 1976 October
PK 761x 1976 November
PL xxxx 1976 December