Enola bound By Angela Cotey | December 6, 2024 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Pennsylvania Railroad M1 class 4-8-2 No. 6987 heads a freight toward Enola Yard near Harrisburg, Pa., in July 1955. The railroad had 301 such locomotives in the M1 and M1a classes built in-house and by Baldwin and Lima. Don Wood photo