Kondratiev and a group of Leningrad specialists visited America to learn about local developments.

A new model of the Leningrad tram was derived from this research trip based on the Peter Witt design.

The design was modified in accordance with Soviet domestic requirements; in particular, the width of the wagon was reduced.

Later for political reasons, the wagon names were changed to LM-33 (Leningradsky Motorny projekta 1933 goda) and LP-33 (Leningradsky Pritsepnoy projekta 1933 goda), respectively.

[1] Two copies of LM-33 have survived in the electric transportation museum in Saint Petersburg: motor 4275 (undergoing restoration) and the loading platform at the LM-33 No.