GG1 and P70s By Angela Cotey | December 9, 2022 | Last updated on August 7, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Pennsylvania Railroad GG1 4907 leads a southbound train at Aberdeen, Md., in about 1949. The six-car consist contains four modernized P70 coaches, a diner, and a parlor car. Robert A. Hadley photo