Keller's first special which he used between 1949 and 1952 when he moved to
the JKZ. The Keller used a modified Fiat chassis
running gear and front mounted JAP engine which was later replaced by a
twin. The best recorded result for Jakob was tenth at
Freiburg in August 1950.
Photo courtesy of Lothar Hermstaedt. If anyone has any more details or photos, please get in touch.