Here's a reply from the owner, it sounds to me like it could be a mix and match mower.. What do you guys think?
"That's brilliant. Would suggest it's not as old as I thought then.
There is no tag on the frame that I can see, but I remeber seeing one inside the primary chain case. The 'by appointment' transfer is one for George, not Liz. I arrived at my date from the construction of the mower itself using the old mower website as reference. They state that the steel side plates, rather than cast iron frames, put it at post 1935, but the pressed steel kickstart makes it earlier than the cast pedal used later on ?! I've also yet to find anymore images than the one I've seen, with the full cast aluminium cooling duct. I'll happily be corrected on anything though"