LeTourneau Inc.’s Sno-Buggy and Swamp-Buggy were built from the same machine; they had the same serial number. When the Sno-Buggy went to Greenland for testing, it had 2 Firestone tires per corner. LeTourneau Inc. and the U.S. Army also tested a new piece of equipment attached to the Sno-Buggy. You’ll have to wait for the book to come out to learn more! When the Sno-Buggy returned from Greenland to the Longview, TX factory, the Buggy’s tires were reduced from 8 to 4 and re-named the Swamp-Buggy.