Montreal Locomotive Works MLW M420 Canadian National #3561 (MR-20c, black, red, North America Logo)Details: The Rapido Trains HO Scale Montreal Locomotive Works MLW M420 diesels are based on he first units to be equipped with Canadian Comfort Safety Cabs. The M420 was equipped with the Alco 12V 251c3 prime mover producing 2000 H. P. Most M420 units rode on MLW ZWT (Zero Weight Transfer) trucks. MLW constructed 103 M420s between May 1973 and February 1977 for four railways including CN (80), British Columbia Railway (16 including eight B units),