or 
Gibson GA-79 T Model Tube Amplifier (1959), made in Kalamazoo, Michigan.
While Gibson has produced many interesting amplifiers over the years, the GA-79 is one of the most unique and most sought after. Introduced to complement the company’s new stereo guitars, the GA-79 was the world’s most advanced stereo instrument amplifier at the time. Indeed, Gibson even encouraged customers to use it as a home stereo amp at the time!
The legend “Multi-Purpose” is printed on the control plate to attest to that, above an input labeled “stereo-phono”. Later examples were designated GA-79RVT with added reverb, but this original style GA-79T has only a tremolo effect.
