https://abudervish.blogspot.com/2011/07/ancient-coin-review-06-sultan-abdul.html
abu dervish: Ancient Coin Review 06 : Sultan Abdul Jalil Shah III - Johor Sultanate (1623-1677CE)
This is a silver coin from Sultan Abdul Jalil Shah era. He became the ruler of Johor Empire in 1623CE. Octagonal silver coin ( Penjur...