A side view of Pennsylvania Electric Locomotive #4896, type GG-1. One of the new streamlined high speed passenger electrics used on all the electrified divisions of the Pennsylvania Railroad. Tender is another Penn. Engine. Rotary snow plow on the right background.
Pennsylvania Electric Locomotive #4896,
photo W005 - by Winnie Ervin (September 8, 1940), from the collection of Dr. William R. Hanson.

Photo W007 - by Winnie Ervin, from the collection of Dr. William R. Hanson.
The world's larges and heaviest steam locomotive built exclusively for passenger service. Built by the Pennsylvania RR at the Altoona, PA shop. The Pennsylvania Railroad's class S1 comprised a single steam locomotive of 6-4-4-6 wheel arrangement in the Whyte notation, the only locomotive of such arrangement ever constructed. Built in 1939 and retired in 1945.

Photo PRR_S1 copied from wikipedia.org

Photo W006 by Winnie Ervin from the collection of Dr. William R. Hanson.