These freight locomotives were built according to the Longboiler or “Bourbonnais” design, i.e. as a six-coupled with large overhangs both at the front and rear. A first series of 16 locomotives was built between 1891 and 1895 and a second of 24 locomotives from 1897 to 1902. The locomotives of the second series had compound engines and the last machines were delivered directly to the SBB. After the First World War, eight came to MÁV. The SBB parted with the last machines by the end of the 1920s. 