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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The Reading actually had 21 2-10-2’s. 3000-3010 were rebuilt from 11 2-8-8-2’s that were built to a Reading design under USRA. In 1931, Baldwin built 10 new engines 3011-3020. During WWII, they all got new main drivers and tapered rods and became classes K-1sd and K-1se respectively.