A windowless booster RS-3, BU41, used between CNW C425 units 402 and 404 on the Winona to Waseca, MN part of the all ALCO Winona to Huron, SD line.
Comments:
This is the BU 41, a booster unit without prime mover made from an RS3. It was used with Alco Century 425 units 404 and 402 primarily on the Waseca to Winona part of the CNW
"Alco line" , Winona to Huron, S.D.