I now realise this is the mower a guy showed me in the late 1980s. It was his domestic mower and was in excellent condition and I remember it had a 125cc with metal G3 carburettor. A neat unit.
It was the first time I had come across the term utility mower.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!