![File:Hæren (Norwegian Army) Stålhjelm M31 baltisk hjelm (Swedish design M26 steel helmet) Norsk løve metallmerke 1935 (Norwegian coat of arms lion) Marinemuseet Royal Navy Museum Horten Norway 2021-09-03 IMG 0767.jpg - Wikimedia Commons File:Hæren (Norwegian Army) Stålhjelm M31 baltisk hjelm (Swedish design M26 steel helmet) Norsk løve metallmerke 1935 (Norwegian coat of arms lion) Marinemuseet Royal Navy Museum Horten Norway 2021-09-03 IMG 0767.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/H%C3%A6ren_%28Norwegian_Army%29_St%C3%A5lhjelm_M31_baltisk_hjelm_%28Swedish_design_M26_steel_helmet%29_Norsk_l%C3%B8ve_metallmerke_1935_%28Norwegian_coat_of_arms_lion%29_Marinemuseet_Royal_Navy_Museum_Horten_Norway_2021-09-03_IMG_0737.jpg/120px-thumbnail.jpg)
File:Hæren (Norwegian Army) Stålhjelm M31 baltisk hjelm (Swedish design M26 steel helmet) Norsk løve metallmerke 1935 (Norwegian coat of arms lion) Marinemuseet Royal Navy Museum Horten Norway 2021-09-03 IMG 0767.jpg - Wikimedia Commons
![POLISH ARMY M31 STEEL COMBAT HELMET by Kloskowski, Krzysztof P.; Rojewski, Jarosław J.: New Soft cover (2016) 1st Edition | Mikhail Barkovskiy POLISH ARMY M31 STEEL COMBAT HELMET by Kloskowski, Krzysztof P.; Rojewski, Jarosław J.: New Soft cover (2016) 1st Edition | Mikhail Barkovskiy](https://pictures.abebooks.com/inventory/22659856602_5.jpg)
POLISH ARMY M31 STEEL COMBAT HELMET by Kloskowski, Krzysztof P.; Rojewski, Jarosław J.: New Soft cover (2016) 1st Edition | Mikhail Barkovskiy
![File:WW2 Norway (andre verdenskrig i Norge) Visor cap (høylue skyggelue politilue) and steel helmet (stålhjelm M31) of NS Nasjonal Samling Fascist party controlled State Police 1942-45 (Statspolitiet) etc Hjemmefrontmuseet Rakkestad 2021.jpg - File:WW2 Norway (andre verdenskrig i Norge) Visor cap (høylue skyggelue politilue) and steel helmet (stålhjelm M31) of NS Nasjonal Samling Fascist party controlled State Police 1942-45 (Statspolitiet) etc Hjemmefrontmuseet Rakkestad 2021.jpg -](https://upload.wikimedia.org/wikipedia/commons/b/b9/WW2_Norway_%28andre_verdenskrig_i_Norge%29_Visor_cap_%28h%C3%B8ylue_skyggelue_politilue%29_and_steel_helmet_%28st%C3%A5lhjelm_M31%29_of_NS_Nasjonal_Samling_Fascist_party_controlled_State_Police_1942-45_%28Statspolitiet%29_etc_Hjemmefrontmuseet_Rakkestad_2021.jpg)