After one week's production at furniture factories in Lahti and Helylä over 2,000 mines had been produced. By the end of the Winter War 133,000 had been delivered. The m/S-40 was an improved version of the mine that differed in detail.
Within a week's production at furniture factories in Lahti and Helylä, over 2,000 mines were made. By the end of the Winter War, 133,000 had been delivered. The m/S-40 was an upgraded version of the mine with distinct features.