This rare transition era amp was dubbed the "Tuxedo" Princeton, due to the Blondeface era (white) knobs, matched with the new Blackface cabinet aesthetics. The circuit is the 6G2, exactly the same as the brown era Princeton. This amp has a changed Celestion Gold speaker, and a changed baffle board. Internally, the filter caps have been changed, along with the preamp & bias electrolytics, and power cord. The circuit is all original otherwise, featuring the famed "blue molded" Ajax coupling capacitors.