General Motors Diesel

600 GMDH-1 A1713 9/1958 600 HP hydraulic unit testing/demonstrating on CPR St.Marys Sub. in 1958.
Bill Thomson

Eventually sold 5/1962 to Federal Railways of Brazil. No other 600 HP units were built aside from 1001.

GMD Feature article includes many EMD demonstrators in Canada including Train of Tomorrow and Aerotrain.