I used two machines of that age, I suspect they were made late 1950's to mid 60's, one was a Maxarc and the other a Reliant, I think by the looks of it that is the era you should be looking at manufacturers.
I doubt the handle is original and the leads would have been clamped down by large turn screws (probably long lost) not nuts.
Also the tank body looks a lot heavier duty than normal, wonder if it is a home made tank to replace the original leaking one.
I know where there is a very similar machine with the colored bands on the lowering rod, it might be a few weeks before i am infront of it but if you don't find anything beforehand i can get a few photos.
Thankyou for the info I'll add those dates to my search criteria.
I've wondered about the tank myself and on closer inspection it seems it's had an outer frame added to it which at some point had a long handle attached to it,the insert for the handle can be seen at the back of the welder.
on closer inspection it seems it's had an outer frame added to it which at some point had a long handle attached to it,the insert for the handle can be seen at the back of the welder.
I wonder if the original tank was leaking and what you are seeing as the tank is just a steel box they made to drop the welder into, a sort of secondary skin which means the original logo could exist on the tank inside the tank...if that makes sense
I had one given me and it was made by Triangle. The knob was not on a tall stick and it had a pointer under it, the power settings were painted on the casing with a paint marker. I checked them with a meter and they were pretty much on the button. It had two brass wing nuts holding the leads. A friend of mine has it now and he still uses it to good effect. The bottom of yours does look like a late addition.