This 1966 Bandmaster is a great value blackface era amp, which has gained popularity since outboard reverb options have progressed. This one features a small mod that's very useful - a post phase inverter master volume, positioned where the ext. speaker jack normally is. Internally it's had the electrolytic caps changed, along with the power cord, and some resistors swapped for old stock carbon comp types. The screen grid resistors have also been changed, but otherwise it's all stock, and still has all original "blue molded" Ajax coupling caps.