For sale at auction: Lot #941 - Equipped with an Arps Snow Bird conversion designed and manufactured by B.P. Arps Company of Wisconsin. The "Snow Bird" was originally used by the New York Guard and later by a rural mail carrier for winter duty through heavy snow. It uses caterpillar style tracks that are driven by 2 sets of rear wheels encompassing the rear tire and two leaf sprung auxiliary wheels on each side. The front wheels have long skies mounted to them. A Model A "Snow Bird" was utilized as part of Admiral Byrds' 1931 Antarctic expedition. This is a rare and extraordinary piece of Americana that is difficult to replicate.