JOHORE: Ala'uddin Riayat Shah III, 1597-1615, AV kupang (0.62g), SS-2, octagonal flan, in Arabic sultan ala'uddin // khalifatul muminin, EF, R. Sultan Alauddin Riayat Shah III was the 6th Sultan of Johore and resided at the new capital of Johor at Batu Sawar, but later moved his administration to Pasir Raja around 1609. In 1606 Alauddin allied with the Dutch to fight the Portuguese in an attempt to oust them from Melaka in a joint military campaign. To this end he ratified two treaties with the Dutch Admiral Cornelis Matelieff de Jonge in May and September 1606. Following a crippling blockade of the Johore River in 1608 and 1609, he signed a peace agreement with the Portuguese in October 1610.