I bought a miller AC arc welder at an auction. It only says Model 62 and serial # 15610 and looks pretty old. I could not find Miller model 62 anywhere on the internet. Just wondered if anyone knows about this model. It is grey, not blue. it is very heavy and sits on wheels. It has a crank on top to set the power and a dial on the front that goes up to 230 amps. I would appreciate any information I can find about it. Thanks, Rick M.