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SaleAthearn 25542 - ALCo 4-6-6-4 "Challenger" (DC Silent) Union Pacific (UP) 3933 - N Scale
MSRP: $399.99$316.59$284.93Union Pacific In the spring of 1941 UP locomotive designers began working on a locomotive to team up with the new 4-8-8-4 Big Boy’s then under construction at Alco. The Big Boy’s were designed to pull heavy freights up the Wasatch Range in...