ARR #1610 is an Alco MRS-1. It was built for the Army (#B2073) in 1953 was purchased by the ARR in 1975 and retired/sold/scrapped in 1984.   In total 13 Alco units were transfered to the Alaska RR.

 

Photo courtsey of E.D. Motis

Anchorage May 14, 1984