One of the Sperry Rail Service's ageless inspection cars patrols the MBTA/B&M Fitchburg line between Ayer and Shirley, MA, looking for hidden cracks in the rails with ultrasound and magnetic sensors. Sperry 134 was built by the St. Louis Car Company as a gas-electric motor car for the Seaboard in 1928 and came to Sperry in 1945.

Photographed by Tom Nelligan, April, 1983.
Added to the photo archive by Tom Nelligan, October 1, 2018.
Railroad: Sperry Rail Service.

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