Quick thread hi jack if you don't mind. My father bought a Massey Harris Dickie side rake in the early fifties. I imagine that they were made in N. America. I used to use it as a schoolboy behind a Fordson Standard model N, or a Fordson Major. If you look at Google Images you will see that the Dickie had a cylidrical concrete counter weight on the back.
My father was a farm manager up until he started farming himself in 1928. He remained friends with his former employer. I remember the old chap visiting us not long berore he died in 1954. He pointed at the counter weight, then painted red of course, and said "is that where you put the petrol in? (Petrol=gasolene)
My brother still has the counter weight about somewhere. I made it into a roller to tow behind the lawn mower.