Hello
WeldspecMany thanks for the resolution to your story.
I regret we paid no part in that.
The brilliant and respected Old Lawnmower club has Atco manuals ...
https://www.oldlawnmowerclub.co.uk/technical/opman/listYour 14" 1956 model is worth recording.
I note the inboard rigger wheels, replacing the front roller.
That is less common and surely an accessory.
These were designed to enable higher grass cutting.
I wonder whether they are original fitments?
Thanks for your tolerance in posting.
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Jack