This is the “classic” DI BLASI folding bicycle. In various versions, it has been known since 1974 as one of the quickest and easiest bicycle to fold. It reduces to a size of 85 x 22 x 60 cm in 5 seconds with three simple steps. In the same manner, it quickly and easily returns to being a comfortable bicycle. The model photographed here is R50 from 1984.