500 Dīnār - Nāṣer al-Dīn Qājār

Nāṣer al-Dīn Shāh's reign produced a chaotic coinage history before the monetary reform of 1876 rationalized the system — this 500 Dīnār piece belongs to the post-reform phase, when the Qājār court was simultaneously modernizing the mint and hemorrhaging silver revenue through trade imbalances with Russia and Britain. The Tehran mint had been re-equipped with European machinery in the early 1870s, largely under foreign technical supervision.

KM#894 spans a fourteen-year window tied to no single political rupture, which makes precise dating within the range dependent on the regnal year struck on the coin itself — each annual die is effectively its own subtype.