The Caterpillar Ten is the smallest of the Caterpillar line, and probably the MOST POPULAR among collectors and restorers today. These 4,500-lb tractors were born and raised in the years of research and development. All of these little tractors were affected by the classifications of the testing procedures as well as marketing strategy. These are the tractors that were sold through the often-debated color change of 1931. Now they can all be found here in one photographic collection. Finally the opportunity for side by side comparisons of these highly sought after tractors is possible.