Nice silver face twin reverb that has the master volume. It is the 100W version not the one with the ultralinear output transformer that is 135W. The amp has master volume so the idea is you can get distortion out of it. The master volume works for both channels but the vibrato channel has an extra gain stage, V4A, so you can try to get a more aggressive tone.
Terrible picture sorry for that. This amp has been totally recapped by someone else which is awesome. Works very nice and just needed a new speaker to replace its blown one.
Fender Twin Reverb, Quad Reverb, Super Six schematic