Examples of this type were constructed as Mallet locomotives.
The Chemins de Fer Departmentaux Vivarais and the Chemins de Fer Departmentaux Lozère each possessed 2-4-4-0 Mallet locomotives.
The Société Alsacienne de Constructions Mécaniques built three for the Vivarais system in 1908 and two for the Lozère system in 1909.
[1] Russian "Class І" (de:Russische Baureihe І, German Wikipedia) were rare examples of Mallets designed for passenger service.
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