In 1955 the Bellanca Aircraft Corp. manufactured the aerial delivery sled for the US Air Force. The container was designated A-16 and had a National Stock Number (NSN 1670-00-234-8354).
The sled could be parachuted into a remote area and then could be easily towed due to its light weight. The sled was designed to be very light weight and was built from a magnesium alloy and weighs only 25 lbs. while measuring 21”wide x 14” high x 44” long.
The sled has a sealed top cover that is held in place with clamp latches. New, the sled cost between $1400 and $2200 and were eventually sold as surplus.
http://www.snowmobilemuseum.com/index.php?page=Sleds_on_Display&list=12&archive=0