1971 Rickenbacker 4001 Bass

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1971 Ric 4001 features: cresting wave shaped medium length headstock with walnut wings, Grover Imperial wavy or flat tuners, logo on plexiglass truss rod cover, full width maple neck through body design, full width triangle crushed pearloid fret markers, 20 frets, checkered binding, toaster shaped neck pickup, four pole bridge pickup including cover and chrome surround, white pickguard, clear plexiglass thumb rest, heptagonal shaped knobs with silver top and lettering, CTS potentiometers, Sprague orange capacitors, cloth and plastic combination wiring, ric-o-sound input jack plate, pots cavity marking, 3 way pickup toggle switch, chrome "gaptooth" bridge including mutes, black Tolex case with orange or blue 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 1971 Rickenbacker serial numbers are:

KA xxx 1971 January
KB 06x 1971 February
KC 45x 1971 March
KD 18x 1971 April
KE xxx 1971 May
KF 52x 1971 June
KG 45x 1971 July
KH 87x 1971 August
KI xxx 1971 September
KJ xxx 1971 October
KK xxx 1971 November
KL xxx 1971 December