I have emailed someone to see if they have a owner's/repair manual. I will let you know if they come up with something or not.
John Wright

My pastor has a welding shop and his father's welder is still in there. It uses knife switches to change the amperage from one setting to another. He claims it still works, but needs cables and an electrode holder. I forget when he said it was made, but it just shows how far we've come in the past few years. He keeps it along with the other old tools to remind him where his shop started out. He's got the work bench and all set up like his father had it years ago. He's in a new shop now and he moved all that stuff and set it all back up for remeberance sake. He told me the doors on his old shop came off the first firehouse in his town. When they built a new firehouse he got them at a auction, years and years ago.
John Wright

My great uncle was the local Blacksmith in town. He had an old welding machine that ran off a flathead Chrysler. It was a Hobart welder. My cousin who had worked for him told me it was rated for 500 amps. He had purchased it from an army surplus supplier just before the start of WW2. My cousin said they used it more for thawing frozen water pipes in town and for farmers out in the country than for welding. He said they made the farmer supply the gas LOL. The sad part of this is that it sold for 20 dollars on the auction and the scrap dealer that bought it melted down the copper and sold the rest as iron. The acytlene genorator went for 10 bucks..