That's great
BHIt looks like this handle is not foldable, suggesting a late 1950s lawnmower.
The handles are quite agricultural looking - and distinctive.
In the last few months two versions of these mowers have been found.
No 1 below is an alloy chassis and has a Victa engine. No air cowling.
No 1 is the earliest machine (because it does not have single point height adj.)
No 2 and 3 are the same model, pressed steel chassis; Hurricane engine.
All have the same tank, muffler, carby(?) and handle bar.
These mowers have not come from a small manufacturer.
I guess there would be at least half a dozen possible candidates.
We'll just have to wait for a breakthrough.------------------------------------------------
JACK