Hello Lawrence, the Hobart in the background, that you asked about, is the machine that I mentioned in the post when you talked about the MM35 that you said you had drug out of moth balls and that short-circuit transferred so sweetly. I don't know exactly how old it is(unlike myself), but it is a motor/generator 300 amp, 100% duty cycle, CV output power source. The legend on the machine says "Hobart Microwire", it is a phenomenal machine for running GMAW-S and FCAW-G. Is powered by a 15 HP 3-phase motor and whines like a ........ Tried to determine age but haven't had any luck. Hobart Micro-Wire, Mod. MC 300, Ser. No. SBW 22386, Spec. No. 4914A Best regards, Allan