If it's that small, and silver (or at least silvery), then my two go-to first guesses would be (a) Ottoman Empire, early akche or (b) Emirate of Sind, small dirhams. The writing style on this piece pushes me more towards the first option.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis