"The Royal Württemberg State Railways (Königlich Württembergische Staats-Eisenbahnen or K.W.St.E.) were the state railways of the Kingdom of Württemberg (from 1918 the People´s State of Württemberg) ...
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between 1843 and 1920. Please see also the main article History of the railway in Württemberg." - (en.wikipedia.org 03.06.2020)