BLI 10612 HO Scale Big Boy 4-8-8-4 UP 4024 with Wilson Aftercooler 1944 Paragon4 DCC CR12 Early to mid-production phase 2

Early to mid-production phase 2 GP40-2s were built from mid-1976 through late-1979

Includes two complete 1/25-scale kits

simulating the "Ayoriya Type-E" configuration

* For details on waterproof standards

BLI 10612 HO Scale Big Boy 4-8-8-4 UP 4024 with Wilson Aftercooler 1944 Paragon4 DCC CR12 Early to mid-production phase 2BLI 10612 HO Scale Big Boy 4 8 8 4 UP 4024 with Wilson Aftercooler 1944 Paragon4 DCC When railfans think of big steam, one locomotive almost always comes to mind: the Big Boy. Often regarded as the largest steam locomotive ever builtand certainly a contender for the world's most famous locomotivethe Big Boy was created to meet some of the most demanding operating requirements ever placed on a steam engine. The Union Pacific Railroad needed a