Here's the unmodified picture, but I'm afraid it's the same size.
The write-up said:
"Designed by Vaclav Krejbich (Czechoslovakia) in 1949, the Krejbich was an experimental 2-seater vehicle. It was powered by a number of 2-cylinder 2-stroke engines built by Jawa ranging from 200cc - 350cc providing power to the single rear wheel. The Krejbich had a top speed of around 80 km/h. It is believed that around 72 vehicles were produced in total."