The Glasgow tractor was designed by William Guthrie and produced from 1919 by a group of Scottish companies, including the Wallace Farm Implements Co. of Glasgow. The design featured three equal-sized wheels, all of which were driven, and a unique system of ratchets were used in place of a differential to ensure that the two front wheels turned at the correct speeds. A US-built four-cylinder Waukesha engine was used to power the tractor, which was rated at 27 hp. Sales in Great Britain were disappointing, although a number of tractors were shipped to the British colonies, where a few still survive today. Production of the Glasgow tractor ended around 1924, and an attempt to relaunch the tractor a few years later was unsuccessful.

(Click on images below to enlarge)