| AHC. Here is a duplicate 35mm color slide by an unidentified photographer that was taken at the Horseshoe Curve near Altoona, Pennsylvania, c. 1961. Shown here are two unidentified Pennsylvania Railroad EF-17M road switchers ~ built by GM-EMD and rated at 1,750 horsepower each ~ leading a freight train around the Curve and down the Allegheny Mountains to Altoona and points East. |