ISLAMIC, Islamic Weights. Circa 10-13th centuries. Weight of 20 Dirhams (Orichalcum, 23 mm, 59.16 g), a Seljuk or Beylik coin weight in the form of a polyhedron with doubly truncated ends; all faces covered with numerous 'bird's eye' motives. Istanbul -. Silifke 127. A very sharp and clear example. Patina stripped, otherwise, extremely fine.