A wooden monowheel that dates back about 150 years!
This monowheel, from the 1930’s is called ‘The Dynasphere’
“Weston-Super-Mare. ‘The Dynasphere’ …its other name is ‘Jumbo’! Dr J. A. Purves, FRSE demonstrates his remarkable invention in ‘spherical locomotion’, which it is claimed, will one day revolutionise modern transport.”
Here’s a monowheel from 1935…
Journal of Light B0614 01/1935
Description sequences: a giant wheel has, within its circle, the motor and the steering wheel; the inventor driving the bike-wheel demonstrates the qualities of lightness and maneuverability; a group of bikers follows the strange inventor who runs with his bike-wheel