UP Big Boy 4006 - A close up of the number plate

UP Big Boy 4006 - A close up of the number plate
UP 4006 - Number plate, bell, and number boards

This is the number plate, bell, and number boards of  Union Pacific Big Boy X4006. The steam locomotive is on display at the National Museum of Transportation. UP 4006 is one of 25 Big Boy locomotives that were built for the Union Pacific Railroad in the early 1940s, and are considered to be the biggest steam locomotives ever built.

Photo taken: April 12, 2005. Kirkwood, Missouri.


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