1972 Rickenbacker 4000 in Fireglo.  Here we have something special.  In early 1972 Rickenbacker introduced the “shedua strip” – the “skunk stripe” walnut strip forming the centerpiece of the neck – in its 4000-series bass line, thus changing from a one-piece to a three-piece neck construction.  This bass guitar is a model 4000, which means it has only the treble pickup, as opposed to the 4001 model which has an additional pickup a the neck position.   In late 1972, the neck-thru construction was no longer used and the 4000 model changed to set-neck construction; that is, the neck tenon was glued into the body and does not run the entire length of the bass. (See 1975 Rickenbacker 4000, below.) So this particular instrument is one of the few 4000 models produced – only in 1972 – with a three-piece neck-thru construction.  Pretty cool!   In very clean condition with its OHSC.