We had a district hospital in the town I went to primary school in and the grounds were well maintained by the gardener, who in those days was on staff there.
He had a large Victa Imperial and that was fitted with a sulky. It looked like a tractor seat with two wheels and was attached to the big cylinder mower via a drawbar. I thought it was magnificent at the time and would try and get a closer look when it was parked in his workshop only to be shooed away.