Due to shortages of powerful locomotives with low axle load during World War II, seven of the class P locomotives were rebuilt to a 4-6-2 arrangement and designated class PR, starting in 1943. Two of the class P locomotives have been preserved, as well as one unit of class PR.
References
^Jensen, Niels (2001). Danske damplokomotiver (in Danish). Aschehoug. pp. 55–56. ISBN87-11-16259-7. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)
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