The Simplicity “Air-Conditioned Lawnmower” 1957
This futuristic “Air-Conditioned Lawnmower” was built by the Simplicity Manufacturing Company, a U.S. company founded in 1922 by William J. Niederkorn. They built the contraption in 1957 and called it the Wonderboy X-100. The mower was featured on the 1958 cover of Mechanix Illustrated and was clearly well ahead of its time.