In researching vintage mowers some unusual machines crop-up from time to time. Generally they are found by accident.
I was researching Suffolk 'Clipper' mowers when I found an article from the Australian Town and Country Journal from 25 August, 1888. That article described an "Improved Lawn Mower" [see below].
Further investigation revealed that it was an American "Clipper", made by the Clipper Lawnmower Company of Dixon, Illinois - a town associated with its 'most famous son', Ronald Reagan . . . [say no more]. [see http://www.discoverdixon.org/]
Here is a YouTube clip of one:-
[video][/video]
This would have been quite an inefficient machine as a push mower. Sickle bar mowers really need horse power to make them work, and in history, that is exactly what happened. The efficient reel mower ruled supreme over domestic grasses . . . at least 'till the late 1940s.
Below is the 1888 article from an Australian newspaper.