Timeworn T1 By Angela Cotey | November 21, 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 class T1 4-4-4-4 duplex 5536 shows the effects of hard service at Chicago in the late 1940s, but the engine is in fact less than five years old. Classic Trains coll. Share this article Print Facebook