Flat, green. writing on both sides, arabic on front, arabic and proto-arabic on back. Talismanic square on front, Koran on reverse.Sommerville Cat. 1501: "Jade. Very elaborate Persian talisman with a square of mystic numbers, which rendered in our numerals read thus: 1279 1283 1280 12721285 1273 1278 12841274 1288 1281 12771282 1286 1270 1287Surrounded on three sides of this square are talismanic inscriptions. They are religious. Reverse, a beautiful inscription of a long verse from the Koran."Inscribed