I'm guessing that it isn't a financial instrument of some kind, since I'm not seeing anything that resembles a denomination. Nor do I see a date. But I'm afraid that's about my limit for reading Arabic without help.
It does seem to be official Ottoman Empire issue. And I'm guessing (again) that the word in the small grey box is the city of issue.
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