Ayer, MAPower for an eastbound returning to it's train through Ayer Interlocking. Power east to west: BM 4268 F-7A, 4227 F-3B, 1506 RS-3, 1730 GP-9, 1754 GP-18, 1732 GP-9.
Photographed by Bruce Nelson, May 11, 1972.
Added to the photo archive by Bruce Nelson, July 9, 2017.
Railroad: Boston & Maine.
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