du Bousquet locomotive

The boiler and superstructure were supported upon two swivelling trucks, in a manner similar to a Meyer locomotive.

The design largely overcame the problems the Meyer design had with poor sealing on the steam-pipe flexible joints by having the rear truck, bearing the high-pressure cylinders, mounted on a bearing that permitted only rotation and not any other axes of flexibility.

The steam connection, mounted in the center of this, could seal much more easily since it did not have to allow so much freedom of movement.

The tanks above the rear truck, and the rear-mounted fuel bunker, were attached to the boiler and superstructure.

They constructed 48 units, numbered 6.121 to 6.168, which were painted chocolate brown like all the Nord's compounds and assigned to the Le Bourget and Hirson depots.

[6] Ten locomotives were built for the Andalusian Railways [es] to the Spanish 5 ft 6 in (1,676 mm) gauge by SA Usines Métallurgiques du Hainaut.