M1940
The only Finnish manufactured helmet during that period is the M1940. Since it was copied from the Swedish M1937 it closely resembles that model. The only difference being the metal stamp in the rim and the maker mark that is often missing in the dome of the helmet "Valmistanut Wärtsilä Yhtymä Oy"/ Manufactured by Wartsila.
The only Finnish manufactured helmet during that period is the M1940. Since it was copied from the Swedish M1937 it closely resembles that model. The only difference being the metal stamp in the rim and the maker mark that is often missing in the dome of the helmet "Valmistanut Wärtsilä Yhtymä Oy"/ Manufactured by Wartsila.