Athearn N scale Challenger 4-6-6-4 Union Pacific Steam Locomotive. The item "Athearn N scale Challenger 4-6-6-4 Union Pacific Steam Locomotive" is in sale since Sunday, December 5, 2021. This item is in the category "Toys & Hobbies\Model Railroads & Trains\Railroads & Trains\Locomotives". The seller is "jesvern0" and is located in Oakland, California. This item can be shipped to United States.