Indo-Persian turban helmet, late 15th century, Persian, Caucasian, or Anatolian, St Irene (Ottoman) arsenal mark, steel, silver, copper alloy, H. including mail 22 in. (55.9 cm); H. excluding mail 13 5/8 in. (34.6 cm); Wt. excluding mail 3 lb. 9 oz. (1616 g), Met Museum. Retains the alternating solid and round riveted mail aventail that protected the lower half of the face and neck.