1 Shahi - Iran - Safavid Dynasty - Shah Sultan Husayn I
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In this case Abbasi is the Shah ruling Persia (Safavid Dynasty) starting in 1642 AD as opposed to the Abbasid Dynasty that ruled Baghdad etc. from 749 to 944 and as a spiritual authority from 946 to 1258 AD.
Quote: "Magna"Abbasi stands for the face value, but the weight doesn't match with it, it's a Shahi here.
Yes, Abbasi is a weight / denomination equal to 4 shahi. I was incorrect in stating that it was also the name of a ruler; 'Abbas is the name of three of the rulers, not Abbasi.