Patent chain automaton minor

This little 10 inch PCA minor hasn't been touched since I bought it, it was my first old type mower around the 1920s but haven't delved into dating it, I think the chain isnt its original as its at its maximum adjustment and still a little slack, it works but throws the chain off. Love the handles for the grass box, one of my on the to do list but won't be messing around with painting it, I'll get it sharp, put the right chain on and make sure it's preserved and replace anything that it needs.