Pennsylvania Railroad #4927 at the Illinois Railway Museum in 2004

Pennsylvania #4927 is a GG1 built by the Pennsylvania Railroad at its own Juanita Shops in Altoona, PA in 1942. 139 GG1s were built between 1934 and 1943, all for the Pennsylvania Railroad. They were transferred to the Pennsylvania’s successor Penn Central in 1968. 40 GG1s were eventually sold to Amtrak, including #4927 in 1976, when it became Amtrak #4939. The rest operated on Penn Central’s successor Conrail until 1979. 13 of those were acquired by New Jersey Transit. Amtrak retired the GG1s in 1981. The last operating GG1s were retired from New Jersey Transit in 1983. Today, only 16 of the 139 GG1s survive. #4927 is one of those few, having found its way to IRM after its retirement in 1981. It was restored to Pennsylvania colors in 1999.

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