Broadway Limited Imports Brass Hybrid HO 4805 Union Pacific Class CSA-2 'Early Challenger' 4-6-6-4 'Post 1947 Re-built Front Engine' with Paragon4 Sound/DC/DCC & Smoke - UP #3830
Athearn HO scale class Z-8 Challenger | ModelRailroader.com
Athearn - The Union Pacific CSA (Challenger Simple Articulated) Challengers were the first 4-6-6-4 steam locomotive built by American Locomotive Company for the Union Pacific Railroad. Two orders of “original” also known