ARR #1610 is an Alco MRS-1. It was built for the Army (#B2061) in 1953 was purchased by the ARR in 1975 and retired/sold/scrapped in 1983.   In total 13 Alco units were transfered to the Alaska RR.

 

Photo courtesy of J. Claflin

Anchorage Yard in July 8, 1976