in Milwaukee The models offered in 1932, the first year of production, were: • G - with small box and tow bar • GA - with small box and no tow bar • GD - with large box and no tow bar • GE - with large box and air tank In 1933, the GDT, with large box and tow bar, was added to the line. In 1942, the small and large boxes were replaced with a standardized intermediate-sized box that was manufactured for Harley-Davidson by the Chas. Abresch Co. in
Milwaukee, Wisconsin. A gold, red, and black water transfer decal from this company was affixed to the top inside of the box lid. This box continued to be installed until 1966, after which it was replaced by a fiberglass box; all preceding boxes were made from steel. ==Engine==