1962 GIBSON GA-300 Super 300RVT. 60 Watt w/ OPTICAL COMPRESSOR BUILT IN & Two Bridgeable Channels. *Three 12AU7, Two 6EU7, One 7199, One 0A2 & Two 6L6 + 6 Diodes (*Changing out for 12AX7's in the Pre-amp could push compressor into killer unique tones) + Gibson's Unique Deep Tremolo & Reverb. I'm not sure on the 12 inch speakers..This "TUCK AWAY" HEAD -TWIN was part of their "High End" series & a year later in 1963 switched to JBL. Neat ideas..Gotta save Schematics.