1940 Humber Hexonaut GS 6×6 Amphibious Prototype
Offered by Auctions America | Auburn, Indiana | December 8, 2012
Here’s another amphibious vehicle – although it’s much smaller than the Duck above. And it’s much rarer, being the only one in existence as the vehicle never entered production as it was “not fit for duty.” It could hold eight men or 1-ton of supplies and has two engines (of 14 horsepower each) and transmissions – one for each side/set of three wheels. This is also how it turned (operating them at different speeds), as you can see how close the wheels are to the body. Unpopular in 1940, this style would become more popular decades down the road on some ATVs. The estimate is $30,000-$50,000. More info here.
Update: Sold $47,500.