Persian Helmet and Shield, 1700s,
This Persian Helmet was fashioned circa 1700s in the style called chichak. It has a conical fluted skull, terminating in a short square spike, ear protection and a sliding nose guard passing through the peak. This style was commonly used by the cavalry of the Ottoman Empire.
The Persian and East Asian versions might have developed independently, with both influenced by earlier Mongol helmets. Conquest-era Mongol helmets were fairly diverse, bowls of various types of construction, but usually dome-shaped rather than conical. The danglies varied from small ear and back of neck flaps, often fashioned from textile, through to wrap-around versions, often leather or bone, giving good face protection, as seen on later Qing helmets. into more recent times.
Image with thanks to ; historic blog: https://historical-nonfiction.tumblr.com