Mesa Boogie Mark I (1977)

1977 Mesa Boogie Mark I. 60 watts with 2x 6L6, and 3x 12AX7. Volume 1 with Pull Gain Boost, Volume 2 with Pull Bright. Master Volume, Treble, Bass, and Middle Controls. Rear Mounted Slave and Presence Controls. 1x 12" Altec 417-8H Speaker

S/N# A690