Does anyone know roughly the percentage of silver contained the Mughal and Afghan rupees of the 1700's-1800's? I know the composition may vary some through the decades, but I would think there would be some standard amount of silver the rupee would contain. The weight of the rupee seems to have been relatively stable over these decades.
(NOTE: For those who would respond: “Google is your friend.” I already tried that with no success).
Thanks in advance for your replies.