This car is a ZF Champion Replica. The ZF company - Zahnradwerke Friedrichshafen- Gearwheel company, they still exist, built this car for exibition and their 90th. anniversary.Its not actually known how much cars were ever built in 1946. About 5 or 6.
None car survived.
For further informations here are the contact details
ZF Friedrichshafen AG
Gisela Mattes
Graf von Soden Platz 1
88046 Friedrichshafen