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Washington, D.C., circa 1921. "Union Station tracks." Receding in a haze of soot, steam and mildew. National Photo Company glass negative. View full size.
It's a Pennsylvania Railroad class E6s 4-4-2 Atlantic.
5218 or 5318 - On whose roster? Anyone?
looks very archaic for an engine running in 1921. It still has a box headlight and tailrods - which means its not yet superheated, so its an E6, not an E6s
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