Ayer, MAExtra from McVille arriving Ayer with 3 units. The second unit, BM 1506 phase III RS-3 has had it's train lighting box removed leaving a "notch" in the lower-rear portion of the radiator.
Photographed by Bruce Nelson, July 14, 1972.
Added to the photo archive by Bruce Nelson, July 29, 2017.
Railroad: Boston & Maine.
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