Clayton Classic Barrel Heater
The Clayton heater was used in 1960's Jaguar saloons as well as cars from Daimler, Alvis, Lea Francis, Armstrong Siddeley, Rover and the Land-Rover S1.
It is also very similar to the Smiths unit fitted to Morris, TR3, Austin-Healey and Jaguar XK.
This is a single speed 12V motor. The unit can be specified with a 6V motor for an additional charge as a special order item.