German Fritz Fend built his Flitzer 3-wheel microcar in Rosenheim from 1948 to 1953.  Originally his cars were single-seaters, but a 2-seater was launched in 1953.  Over 250 Flitzers were built before the design was taken on by Messerschmitt.

1951 Fend Flitzer 101.  Model by SAMS Model Cars