No. 1100 (builder no. 7438) is a 65-ton Porter.  It was built in 1943 for the Navajo Ordnance Depot (AZ) and later acquired by the US Army (#7157).  It was acquired by the Alaska Railroad in 1947 and retired in1954.  It was then acquired by Sherwood-Templeton Coal (#7438), sold to Yankeetown Dock 3 (IN), resold to Precision National in August 1973 for scrap.  It is picture here in the Anchorage Yard, date unknown.
Alaska Railroad photo, Jack Klingbeil collection