ATHG97971 Union Pacific UP 4-6-6-4 Challenger Steam Locomotive #3985 Steam-Engine Wheels with RP25 contours operate

Wheels with RP25 contours operate on all popular brands of track

Size approx (mm) 18 x 18 x 30

2 x Watch Towers

The packaging has been carefully designed so that once you have removed the pots

7th and 11th Armoured Divisions

ATHG97971 Union Pacific UP 4-6-6-4 Challenger Steam Locomotive #3985 Steam-Engine Wheels with RP25 contours operateUnion 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 Utah to the division point at Green River, WY. What was needed was a locomotive to take over at that point that could speed the freights eastward across the Wyoming Division. Building on their experience with the