Original 'Khulla', Indian hat used by Muslims to build their turban while serving in the Army. The Khulla rests on the head and the fabric wrap called a Pagri', is wrapped carefully around it to form the classic Indian Army turban.
This item is not used by the Sikh soldiers, but rather was a uniform accessory applied to the Muslim soldier outfit.
These are original and were made during WW2. Many have original markings on the inside. Very good condition and likely, were never issued. Very limited supply.