After the nationalization of the private railways had the SBB in their fleet a wide variety of car types, which were not up to the new requirements. Based on positive experiences with wagons with axles of 9.00 m, standards were set for the new types to be procured. For Nebenstrecken the biaxial second class carriages were included in the program.

The cars were built as transit cars and had fabric-covered upholstered seats in the second class and wooden benches in the third class. An abortion was available. In the third class 38 seats were offered and the second class included their 14 seats, each divided into smoker and non-smoker.

Registration numbers: BC3 4651 - 4730

From 1947 Nos. 8702 - 9068.
From 1947 Nos. 8601 - 8701
In 1960 still 222 cars in operation