I have this Model 356 Heater brand new in the box, I got it from a Military Surplus Auction decades ago. The manufacturer's info on the box says the following;
MP - Mobile Products Division
HUPP, INC
1135 IVANHOE ROAD - Cleveland, Ohio 44110
One Of The White Consolidated Industries
WCI
----------------Blower
356 - 6V
----------------Heater
Here's photos of it;
http://s730.photobucket.com/albums/ww307/Conveyician/Model%20356%20Heater/Hope this answers your questions.
