The standard Blues Junior is dressed like a traditional black Fender amplifier, with black Tolex upholstery and a silver cloth speaker grille.
Fender frequently releases limited editions of the Blues Junior.
All have the same electronic components and specifications but have cosmetic changes and often a different speaker, at varying prices.
The original circuit board underwent a major redesign in 2001, when production moved from the US to Mexico.
Many green board models have excessive noise in the reverb circuit, as the signal is inserted into the reverb after the master volume.The later circuit boards are cream or tan colored and sound "brighter" or more treble-oriented, with the reverb situated before the Master volume.