Pennsy power By Angela Cotey | September 30, 2024 | Last updated on August 8, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Pennsylvania Railroad 2-10-4 No. 6456 is one of 125 such locomotives on the roster. The home-built engines were in the J1 and J1a classes, built between 1942 and 1944. The last was retired in 1959. Classic Trains collection Share this article Print Facebook