Esto es lo que he encontrado:
Arabic legend: Shahada followed by yamin al-daula wa amin mahmud al-milla
(Mahmud guardian of the faith), al-qadir at left, billah above
Date in the margin: AH 418 (= 1027-1028 CE) /
Sanskrit legend in Sharada letters: avyaktameka muhammada avatar nripati mahamuda
(the Invisible is One, Muhammad is the manifestation, Mahmud the king)
Saludos