20-30148-1 UNION PACIFIC BIG BOY SEMIQUINCENTENNIAL WITH OIL TENDER #250-O QuickBooks Unit Measures: 6 x 6

Unit Measures: 6 x 6 x 14 3/4

cockpit displays

2 Bells changeable by CVs:

Each package includes three tubes

the locomotive still represented the latest and potential future in steam power

20-30148-1 UNION PACIFIC BIG BOY SEMIQUINCENTENNIAL WITH OIL TENDER #250-O QuickBooks Unit Measures: 6 x 6Just months before Pearl Harbor, the American Locomotive Company delivered the first Big Boy to the Union Pacific Railroad. The UP's Department of Research and Mechanical Standards had designed the locomotive for a specific task: to pull a 3600 ton train unassisted over the Wasatch Mountains in Utah. While the Big Boy is often cited as the biggest steam locomotive ever built, in fact it is not. The Norfolk & Western's Y6 and A, the Duluth Missabe &