Somerville, MABM 1556 GP-7 switching a B&M Budd RDC-9 at BET. The single engine RDC-9's did not have engineer or hostler controls, so only way to move them was with another engine or RDC.
Photographed by Bruce Nelson, 1974.
Added to the photo archive by Bruce Nelson, July 29, 2018.
Railroad: Boston & Maine.
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