Funnybug sez:
If I recall, this is considered a Berry Maxi T.

Ebay Description:

Low Mileage Very Rare VW "Model T" Buggy, built in 1973 with a nearly new VW with only 1200 miles, the car now has less than 4000 actual miles. 1600 Dual Port engine, body is in great condition, it has the very rare engine cover. 4 Seater. The original speedometer from the donor car was installed in the buggy. The engine still has the original belt, points, etc, and has never been apart, again the drive train has less than 4000 miles since it left the Volkswagen factory in 1973. Still has the original tires on the front. Rare opportunity to own a one of a kind, extremely nice dune buggy.