|Zak. Here is a duplicate 35mm color slide of a photo by Martin S. Zak. Shown here (R to L) are Pennsylvania Railroad engines #5868 and two E-8's whose numbers are not recorded. All were built by GM-EMD. #5868 is an EP-20 built in April of 1949 and rated at 2,000 horsepower. The date and the location are not recorded.