Pennsylvania K4s 4-6-2 No. 5399, built at the railroad’s Juniata shops in 1923, was rebuilt by Lima in 1939 with a front-end throttle and poppet valves to improve performance and efficiency.
Photo by Lima Locomotive Works
Refined steam
By Faith Finfrock | September 16, 2020
| Last updated on August 8, 2025
