Struck in Constantinople (Istanbul), so you will find it listed under "Turkey" in the catalogues.
The denomination is 40 para. The date... is always difficult to calculate for Ottoman coins as they didn't make it easy. The accession year is 1255 (Islamic calendar) and the regnal year is 20. Doing the maths, 1255 + 20 - 1 = 1274 Islamic calendar, which converts roughly to AD 1857.
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