An Ottoman chichak, a type of helmet (migfer) originally worn in the 15th-16th century by cavalry (sipahi) of the Ottoman Empire, consisting of a rounded bowl with ear flaps, a peak with a sliding nose guard passing through the peak, and an extension in the back to protect the neck. Various other countries used their own versions of the chichak including Mughal India, in Europe the zischagge helmet was a Germanisation of the original Turkish name.
Osmanlı migfer16.yy 100x184cm yağlıboya tablo(100x184cm,Ottoman sultan helmet,oil on canvas
A khula-khud and sipar - by Czerny's International Auction House
Ottoman chichak type helmet, 16th century, steel, gold, silver Dimensions: H. 10 3/4 in. (27.8 cm); Wt. 5 lb. 11 oz. (2580 g), Met Museum, forged from watered steel and decorated in gold with arabesques and Koranic inscriptions.