Steam locomotive
Most-manufactured classes

The most-manufactured single class of steam locomotive in the world is the 0-10-0 Russian locomotive class E steam locomotive with around 11,000 produced both in Russia and other countries such as Czechoslovakia, Germany, Sweden, Hungary and Poland. The Russian locomotive class O numbered 9,129 locomotives, built between 1890 and 1928. Around 7,000 units were produced of the German DRB Class 52 2-10-0 Kriegslok.

In Britain, 863 of the GWR 5700 Class were built, and 943 of the DX class of the London and North Western Railway – including 86 engines built for the Lancashire and Yorkshire Railway.
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