The CO-OP model E3 is a row-crop tractor built by CO-OP in Brantford, Ontario, Canada. It is essentially the same as the Cockshutt 30. It features a Buda 2.5L 4-cylinder gasoline engine, a 4-speed gear transmission with an optional 8-speed hi-low shift, and two-wheel drive. The tractor has a live 540 RPM rear PTO and mechanical contracting band brakes. It was produced with a total of 37,328 units built and originally sold for $2,500 in 1952. The E3 is capable of pulling 2-3 plows and has tested drawbar power of 27.25 hp and PTO power of 30.28 hp. It has an operating weight of 3,620 lbs and uses 5.50-16 front tires and 11-38 rear tires.