I believe this switcher was built by EMD in February of 1973 (serial #72678) for MCRR as their #425. Some discrepancy though in its serial number listed in the RRPA data base. Nevertheless, this unit slipped into the ADMX roster by 2003. Unknown photographer.
Monongahela Connecting RR Company SW1001 #1001, now ADMX 1002.