LARGE BOX - SOLID STATE RECTIFIED AC50s
The AC50 Mark 3 and Mark 4: 1967 - 1968
10. Later 1966 - 1967
Serial nos in the 7000s
11. Late JMI: 1967 and 1968
Serial nos in the 8000s
Triumph black panel AC50s
Late 1967 and 1968
Speaker cabs and wiring
