It is Persia (Iran)
The mark in the middle is Persian number ``84`` for 875 fineness (used during and after the Russian rule and corresponding to old Russian 84 Zolotniki 875 standard). Digit ``4`` is distinctively different from Arabic, so it must be Persian.
Age cannot be determined based on the standard.
Two other marks are most likely maker`s mark and town in Arabic alphabet but not i Arabic language, so Farsi speaker (Iranian) could read it.