This is the modern version, pcb build, all tube audio path, solid state rectifier, We have one, just recapped the power supply in early 2021, sounds great! Its a cathode biased 1 x 12" using 12AX7's in the pre and verb sections and 4 EL84 for power. It has a switch for moving the tone stack (H, M, and L) either before (classic Fender amps, such as the Princeton and Twin Reverb), or after (like non-MV Marshalls, such as the JTM45 and the Plexi) the first gain stage.
We have 1 of them.