Van Dooren´s Automobiel Fabriek N.V. is a Dutch truck company. Between 1959 and 1975 they also built passenger cars with a unique variable gearing mechanism.
This is a stepless v-belt auotmatic with centrifugal force-hitch that has no surge when the gears are changed.
A strange detail: in front of the automatic gear-shift a reverse gear was installed that could be handled manually, therefore the car could drive backwards as fast as forward.
A DAF 55 Marathon from 1968 has been registered by the Dutch team Rob van Dooren/John van Dam.