Rapido trains MLW M-420
From the manufacturer: The early 1970's were a time of massive change in Canadian locomotive design. CN's mechanical boss, Bill Draper, worked with MLW designers, locomotive crews and the unions to devise a new cab design for freight road locomotives. This would become known as a (Canadian) Comfort/Safety Cab. The first unit to be equipped with his cab was the M420 and it hit the rails in 1973, just a few weeks before the similarly-equipped GP38-2(W).