Twenty-nine 4-6-2+2-6-4 Garratts, constructed between 1936 and 1941 by the Société Franco-Belge de Materiel de Chemins de Fer at Raismes in Northern France, operated until the Algerian independence war caused their withdrawal in 1951. This class, designated 231-132BT, was streamlined and featured Cossart motion gear, mechanical stokers and driving wheels, the largest of any Garratt class. On a test in France, one of these achieved a speed of —a record for any Garratt class (and indeed any articulated class).