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From 1911 through 1917, 70-ton H21a ''quad'' hoppers were introduced for coal service. During 1922 and 1923 all early H21 hoppers were converted to H21a's by replacing the 50-ton trucks with 70-ton trucks equipping them for coal service and bringin g the total to 36,000 H21a hopper cars. The original 1909 through 1930 quad hoppers were built with the ''old style'' double-door configuration. During the 1930s and 40s, all old-style double-door hoppers were were replaced with
...more about the Bowser Manufacturing Co. PRR H-21a 4-Bay Hopper -- Pennsylvania Railroad (Early Lettering) - HO-Scale
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From 1911 through 1917, 70-ton H21a ''quad'' hoppers were introduced for coal service. During 1922 and 1923 all early H21 hoppers were converted to H21a's by replacing the 50-ton trucks with 70-ton trucks equipping them for coal service and bringin g the total to 36,000 H21a hopper cars. The original 1909 through 1930 quad hoppers were built with the ''old style'' double-door configuration. During the 1930s and 40s, all old-style double-door hoppers were were replaced with
...more about the Bowser Manufacturing Co. PRR H-21a 4-Bay Hopper -- Pennsylvania Railroad (Block Lettering) - HO-Scale
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