Romania captured in 1941 a number of 477 various types of 122mm howitzers and guns including M1931/37 and were used as divisional artillery for units rebuilt
152 mm mortar M1931 (NM) (Russian: 152-мм мортира образца 1931 года (НМ)) was a 152.4 mm (6 inch) artillery piece originally developed by the German arms