latest updates; small changes to a few amp batches dates, Dec 2015, Feb 2016, July 2016, Sep 2016, March 2017 small changes to 4 amp batches, Nov 2015 typos found, two edits, thanks Ben H, June 20 info updated, totals unchanged Oct 2014 really nifty table design Aug 2014 small data and totals updates Jan 2014 (info updated In 2002 I acquired a Princeton Reverb II. Fender don't part with that kind of information*, so as part of the website I developed for this amp's care and feeding, I put out a call for serial numbers.
Eventually, I thought, I'll get a rough idea what the highest and lowest s/ns were.
Fender introduced the Blues Junior in 1995, and has revised and updated it periodically since then.
Blues Junior history can be divided into two major categories: the early amps with green circuit boards and the later ones with cream-colored boards.
Code formats were not completely standardized, but a little deciphering will generally yield the info of interest.