The Ferguson TE20 is an agricultural tractor designed by Harry Ferguson the inventor of the 3 point linkage, still in use today (the 3 point linkage system transformed the world). By far his most successful design. The Ferguson tractor was manufactured from 1946 until 1956, and was commonly known as the Little Grey Fergie. It marked a major advance in tractor design, distinguished by lightweight, small size, manoeuvrability and versatility.here are a collection of videos and info on this cool little tractor.And if you own one here is a wealth of info to enjoy this fantastic machine.