FM -H10-44 Diesel Electric Yard service Switcher build dates dated 1944-1950 still being used in the 1970and 80's Z scale 1:220 Fairbanks Morse. total of 195 were bilt for American railroads. Chassis here.
Z Scale H10-44 Frame in Brass (7GPUBZYRA) by shortpainter (shapeways.com)