I just grabbed an Epi Valve Jr with an extension cabinet. The guy I bought it from wasn’t sure but thought it was version 2. Before I attempt any mods or repairs, I’m trying to figure out which one I have. It has 14 digits in the s/n but the 1st 4 don’t work for month and year. There is no print on the red power knob and has 4, 8 and 16 ohm outputs. The serial number is 00602071410816. Any help out there?