You are buying a vintage 1925 Mack Model AB Dual Reduction Drive Motor Trucks, 1 1/2 - 2- 2 1/2 tons Catalog No. 73. Front cover, bottom right, has a stamp of April 8th 1925. This has 46 pages and 6 blank pages in the back of the catalog. All pages are intact and there are no rips, tears, or any writing. This includes some drawings and additional information, such as: Body Dimensions, Specifications of Mack AB Running Gear, and Dual Reduction Drive Brake Data. Catalog is in good shape, see pictures.