Some advice please I have turned up an original Series I Operation Manual with a print date of August 1949. Is this a rare item ? It was left in the garage of the house I bought, the previous owner ( now deceased) was a driver for the local BP Oil works so it is amongst a collection of...

I have inherited a Series I operation manual (circa August 1949) that has 1 page of instructions and a line drawing from the rear of the Mobil welder setup. I can try scanning this in for you if it is of any use.