The E-50 was an electric locomotive built by GE in the late 1960s. It was an upgrade of the E-44, which it resembles strongly. No common-carrier railroad owned it, only a dedicated coal hauler in Ohio, the Muskingum Electric. The E-50s ran from 1968 to 2002. E-50: http://www.rr-fallenflags.org/misc-m/mer100.jpg E-44 for comparison: http://www.rr-fallenflags.org/pc/pc4460ags.jpg Note that the section of lower roofline extends farther behind the cab on the E-50. Also, there are two vents one above the other and with no shield over them.