LONDON, UNITED KINGDOM - OCTOBER 20: An Ottoman Tombak water flask (MATARA), Turkey, circa 17th century (est. £60,000-£80,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: A rare carved ivory box with lily mounts, Sri Lanka, probably Kandy, 16th/17th century, (est. £15,000-£25,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: A Sotheby's staff member wears a large pair of enamelled bracelets with tiger heads, North India, 19th century (est. £25,000-£35,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: Three Ottoman lacquered document holders, Turkey, 19th century (est. £4,000-£6,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: An Ottoman tortoiseshell and mother-of-pearl casket, Turkey, 18th/19th century, (est. £5,000-£7,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: A Sotheby's staff member views a Safavid Polychrome brass torch-stand, Persia, late 16th/17th century (est. £8,000-£12,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: An Ottoman tortoiseshell and mother-of-pearl casket, Turkey, 18th/19th century, (est. £5,000-£7,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: A Abu 'Ali al-Husayn ibn 'Abdullah ibn al-Hasan ibn 'Ali ibn Sina, known as Avicenna (d.1037 AD), Kitab qanun fi’l tibb ('The Canon of Medicine'), volume III, on pathology and diseases, Mesopotamia, Abbasid, title page with the date 538 AH/1143-44 AD (est. £80,000-£120,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )
LONDON, UNITED KINGDOM - OCTOBER 20: A Abu 'Ali al-Husayn ibn 'Abdullah ibn al-Hasan ibn 'Ali ibn Sina, known as Avicenna (d.1037 AD), Kitab qanun fi’l tibb ('The Canon of Medicine'), volume III, on pathology and diseases, Mesopotamia, Abbasid, title page with the date 538 AH/1143-44 AD (est. £80,000-£120,000) is showing at the press view of Sotheby's Modern & Contemporary Middle Eastern Art Sale in London, England on October 20, 2017. ( Ray Tang - Anadolu Agency )