Quite possibly. Re-reading Vercoes story doesn't help, but Pukekohe programmes from 1963 and 1964 show both Robert Rankin and Garth Taylor entered it as the Dina Four, of 977 and 948 cc capacity. 1960 news clipping refer to the Dynafour Special so maybe they were 2 different cars with very similar name. Pity there isn't a photo of the Eric Watt car.
Stu