These steam locomotives, with some exceptions, generally had high reliability and durability for practical use so that they worked extensively all through the prewar and postwar glory days for railroads.
これらの蒸気機関車は、一部の例外を除けば、概して実用上十分な信頼性・耐久性を備えており、戦前・戦後の鉄道全盛期を通じて縦横に活躍した。