The Reading’s 20 class K-1sb locomotives, constructed by Baldwin in 1931 and tipping the scales at a whopping 451,000 pounds, were the last-built and heaviest 2-10-2s in North America. Here, No. 3012 leads a train of anthracite down the Schuylkill River near Tamaqua, Pa., in July 1953.
Classic Trains coll.
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