Chione. Here is a duplicate 35mm color slide via Al Chione. Prominent here is Pennsylvania Railroad engine #5846, an EP-20 built by GM-EMD in August of 1947 and rated at 2,000 horsepower. The photographer's name, the exact date, and the location are not recorded.
Here is the 13th of 18 photos by Fred McLeod that are included in a souvenir brochure entitled "Horseshoe Curve; Pennsylvania Railroad; Altoona, Pa." Photo Caption: "Worm's Eye View of No. 32." Prominent here (R to L) is Pennsylvania Railroad engine #5846 and another unit whose road number is not recorded. Both were built by GM-EMD and rated at 2,000 horsepower each. #5846 was constructed in August of 1947. In this context, this A-A set is powering Train #32 ~ the eastbound "St. Louisan" ~ around the Curve and down the Allegheny Mountains to the Passenger Station in Altoona.