Helmet, one piece of steel. This helmet is made of one piece of steel, 2mm thick. It was used in similar form from 13th to 17th century. At the beginning it was commonly used by the knights as additional helmet (secret helmet). In 15th century it was used as helmet of the light armoured infantry. In 17th century it was used intermittently, sometimes it was worn under the hat. Such helmets preserved as originals and are widely found in iconography of different centuries. Product is non-welded. Surface hammered (*4).