Union Pacific Prototype Locomotive Photos Vol 37
4-6-6-4 Challenger
UP 3975-3999 & 3700-3717
By the Union Pacific Historical Society, James Ehernberger collection.
Softcover, 80 pages, 11x8.5 horizontal format, large b/w photos throughout. 2009.
"Volume 37 contains UP 4-6-6-4 "Challenger" units 3975-3999 (1943 series) & 3700-3717 (oil fuel) , including the railroad's 3985 Heritage Fleet - still in steam! (pp 31). With each locomotive photo you have class, builder, build dates, weights, capacities."
