The first Spanish-designed steel helmet, and despite its designation it was manufactured in 1926. (Some authorities do indeed call it a M26 'sin ala (without wings)' as opposed to the M26. The 'sin ala' may have a good protective shape in today's terms, but it was considerably disliked at the time because of its unappealling appearance.his is an original production helmet; after 1943 the familiar frontal attachment for the Spanish Army badge was added.On the basis of this example the M21 is a somewhat crude and handmade item. The rivets are not uniformly spaced, and the liner attachment is, frankly, careless, some rivets barely holding the leather at all.