Southern Pacific Railroad switch tie plate from Saugus. (Like a regular railroad tie plate, but for a switch, for switching track.)
Unearthed and recovered circa 2017 by the contractor (Rick Kalisz of Happy Valley) during demolition of Pueblo Building Supply at the northwest corner of Railroad Avenue and Oak Ridge Drive, which is just south of the Saugus Industrial Center (former Thatcher Glass complex), which is just south of the original location of the SPRR Saugus Depot.
LW3779: Download original images here. Item purchased 2021 by Leon Worden; transfered 4/2021 to SCV Historical Society.