This is an M-29 Studebaker Weasel. It carries three (3) people in the rear seats but absolutely no more. The weasel was instigated by Churchill to be used for a raid on heavy water plants in Norway and devoloped by Studebaker. The raid never took place, but the weasel in the 29 or full amphib mode as M-29c with front and rear pods was so sucessessful that is was used throughout the ETO, PTO and also korea. It was underpowered buy a 69 hp Studebaker commander 4 cylinder engine and had the same shifting pattern as the jeep. There was no parking brake, which made it very uncomfortable driving on hills and was the only vehicle in the US inventory where a driver could check the oil while sitting in the driver's seat. It's great driving in deep sand, swamps, mud and snow, but very hard to steer and very uncomfortable on hardstand or a street. With 20 inch tracks and 1.6 psi, nothing will stop, it and they are great in deep snow. Photos of the one I had.