For sale is a 1964 Ampeg G-12 Gemini.  

Make:  Ampeg
Model:  G-12 Gemini I
Year:  1964
Tube Layout:  (2) 7591, (1) 7199, (3) 12AX7, (1) 6CG7
Transformers:  O/T 1650F (replaced), P/T 9264913 (original)
Speaker(s):  Jensen C12Q - 220641 (1964, Original)
Reverb Tank:  Original
Foot Pedal:  Original
Power Cable:  10AX250V - Modern (Replaced)