For the light railway between Bielsko-Biała (Bielitz) and Kalwaria, the KFNB needed tank locomotives with a maximum axle load of eight tonnes and the ability to run through tight curves despite a top speed of 50 km/h. The two locomotives were built at Wiener Neustadt in 1888 and got the designation IX.

They got three driving axles at the front and a two-axle bogie at the rear. With a driver diameter of only 1,000 mm, they still could reach the required speed. However it became evident that with empty supplies, the reduced load on the bogie sometimes led to derailments at high speeds, requiring to slow down to 35 km/h.

On nationalization, the two locomotives became kkStB class 191. Around 1910, they came to the line between Zaječí (Saitz), Čejč (Tscheitsch) and Hodonín (Göding). After World War I, when the line was now located in Czechoslovakia, they became ČSD class 300.0. Their withdrawals came in 1929.