The Dynasphere 1932

The Dynasphere, an electronically petrol driven Monowheel vehicle capable of speeds of 30mph, being tested on Brean Sands by it's inventor, the electrical engineer John Archibald Purves (1870 - 1952) on 2nd February 1932 at Weston-super-Mare, Somerset, England. (Photo by Fox Photos/Hulton Archive/Getty Images).