In post-war Poland, many cities struggled with significant shortages of rolling stock, and therefore it was necessary to develop a tram with simple construction and easy assembly.

It was decided to copy the construction of the German tram Kriegsstraßenbahnwagen (KSW),[2] developed during the Second World War to satisfy the demand of local tram transport companies.

Due to the lack of motors, initially the ND trailers for Upper Silesia were built.

[3] The N standard-gauge trams were supplied to: Gdańsk, Gorzów Wielkopolski, Sopot, the Upper silesian conurbation, Kraków, Poznań, Szczecin, Warsaw, and Wrocław, while narrow-gauge versions were used, among others, in Bielsko-Biała, Bydgoszcz, Grudziądz, Elbląg, Inowrocław, Jelenia Góra, Legnica, Łódź, Olsztyn, Słupsk, Toruń and Wałbrzych.

To this day, two units are operated in Bytom, where they are used on a single-track tram line no.