MNNR Bucyrus Spreader; White Bear Lake, MN
The NP caboose here, build in 1914, is actually three years newer than the Bucyrus Spreader being used to flange the tracks.
The only info I can find on this spreader indicates that it's a Bucyrus Model 1, built in 1911. If you have any more info (reporting marks, history, etc.), please let me know.
This image appeared as the secondary photo in the December 2013 Minnesota Rail Calendar.