Here is one of the most popular studio amps Fender ever made. The Princeton was introduced in 1947 as an entry level amp, along with the Fender Champ. The Princeton was a fairly basic 15 Watts amp that has been particularly priced for its recording qualities. The Princeton Reverb was added in 1964, which was basically a version with reverb and vibrato. That amp is also the home of the very first Mesa Boogie mods.
While the classic model was discontinued in 1979, Fender kept the popular Princeton Reverb in the catalogs until 1982. It was then replaced by a 22 watts version, the Princeton Reverb II. 8000 units of the version 2 were produced before Fender dropped the series from the catalog. Fender reissued some of the Princeton series in 2006. Hear the Fender Princeton roar