1964 RICKENBACKER 4001-S BASS
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1964 4001-S features: Cresting wave shaped headstock with walnut wings, Kluson riveted reverse tuners with flathead screws, plexiglass truss rod cover with logo but no model name, maple neck through body design, dot fret markers, 20 frets, no binding, toaster shaped neck pickup, horseshoe bridge pickup with large chrome surround, white pickguard, clear plexiglass thumb rest, black plastic heptagonal shaped knobs, potentiometers, molded blue capacitors, 3 way pickup toggle switch, chrome "gaptooth" bridge assembly including mutes, mono input jack plate.
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 1964 Rickenbacker serial numbers are:
| DA x | 1964 January |
| DB x | 1964 February |
| DC 17x | 1964 March |
| DD x | 1964 April |
| DE x | 1964 May |
| DF x | 1964 June |
| DG x | 1964 July |
| DH x | 1964 August |
| DI x | 1964 September |
| DJ x | 1964 October |
| DK 57x | 1964 November |
| DL x | 1964 December |