Dating rickenbacker bass
Some of these latest models had a little cover over the head stock... They had all the features of a BD-model, just in a different color, much similar to some old bakelite radio cabinets of that time. These were called the BRONSON model and sold without the Rickenbacker label.
Rickenbacker International Corporation has used a number of various systems.Some of the earlier had no corresponding dates to the number, except for the invoices.Below are some of the most common serial number variations.If one (volume), chances are the knob will be of an octagonal shape (first two years). Later and until August 10th 1937, the little tabs or "ears" on each side of the pick-up will bear a "PAT PEND.".Starting 1940 (second genreation, see below) both controls on the treble side. From 08/10/'37 on a patent number replaces the "PAT PEND." stamping.(While I think that the new pick-up it's still a very decent sounding one, I agree, it's not the real deal. However, I don't think that it's the size of the magnet plates that really made the difference but the much smaller winding of the bobbin and the "screw-on" bridge.)Probably in order to reduce the risk of body breakage, Rickenbacker also quit the string-thru attach design and introduced a plated metal tail piece (much like on semi-acoustic Jazz-guitars or Dobro's).