Alco MRS-1 2069

Unit B2069, seen in June 1995. (Photo: Museum of Transportation, Missouri)
Unit B2069 is owned by the Museum of Transportation in St. Louis, Missouri. They received the locomotive in 1993 and it's operational, used as needed to move exhibits around the museum. It came there from the Radford Army Ammunition Plant, located at Cowan, Virginia.
In 1999, the unit was relettered, restoring the numbers and Army markings.

Some more pictures, taken by Chris Zeitvogel at the St. Louis Missouri Transportation Museum in september 1998.