During WWII Hungary was an ally of Germany. The Germans allowed and assisted the Hungarians in copying their design of the M35 steel helmet. Therefore, the WWII produced M35 Hungarian steel helmet is nearly identical to the German WWII M35. Both have the same shape, riveted ventilation holes, and the classic rolled edge. The minor differences between the Hungarian M35 helmet and the German M35 was the liner system, liner pin position, as well as the addition of a small horizontal rectangular carrying hook above the back brim of the Hungarian helmet used to attach the helmet to a backpack when on the move.
The other version the Model 1938 Hungarian helmet was one of the most common types used by the Finnish Army during the Continuation War of 1941-44. The Finns originally wanted to acquire the German M35 during the Winter War of 1939-40 to supplement their old stock of German WWI M17 & M18 helmets however, the German government refused the order and sent it to the Hungarians instead. Apparently this was done for political reasons as the Germans were technically still “allied” to the Soviets (who the Finns were fighting) during the Winter War of 1939-40. Though the order was placed in December 1939, the first helmet wasn’t shipped until after the end of the Winter War in March 1940, which is why they were used extensively during the Continuation War of 1941-44.