The ʿ abbāsī is a four- shāhī silver coin struck by the Ṣafavid ruler of Iran Shāh ʿAbbās I (r. 995-1038/1587-1629) in 995/1587, which dominated Iranian coinage until the middle of the twelfth/eighteenth century. (The shāhī is a Ṣafavid term for a coin equal to 50 dīnār s (golden coin, from Lat. denarius , first struck in 907/1501). The ʿabbāsī came to be known as shāhī-yi ʿabbāsī , or just ʿabbāsī . Two types were struck, one of 120 grains and another of 144 grains, or