A total of 17 of these small tank locomotives were purchased by the VSB for shunting services and light local trains. Due to the long production period, the locomotives came from the workshops of the VSB and a total of three other different manufacturers. The last ones were delivered directly to the SBB. Despite the short wheelbase and small wheels, the top speed was 60 km/h. The water tank was inside the frame. In 1919 and 1920, five of the locomotives were converted into heating cars. The other locomotives were retired between 1908 and 1933. 