For your consideration a Pre CBS Vibro Champ.  The amp is stamped 1965 but based on the components, knobs etc. was likely assembled in 1964 or very earily 1965.  When the amp came in it needed  a bias cap and resistor replacement to make it operational. The other electrolytic caps passed an esr assessment.   As such it was left as original as possible while playing to specification. The amp was gone over.  The number of components requiring attention was very limited, given the age of the amp.  Except for one knob it is cosmetically original.   The amp is now play ready with all that mid 1960 vib.