This is a gold coin from Sultan Alaudin Riayat Shah era. He was the son of the last Malacca Sultan, Sultan Mahmud Shah who fled from Malacca after the invasion of Portugese. He became the first ruler of Johor Empire in 1527CE.he set up his capital at Johor Lama situated on the Johor river. He promoted foreign trade and was able to attract a fair amount of commerce. However Johor was captured by Acheh in 1564CE and became its vassal state until the collapse of the Acheh Empire in 1641CE.
Octagonal gold coin ( kupang) under the rule of Johor Sultan Alaudin Riayat Shah 1 (1527-1564AD).
Similar coin was sold for SGD750 ( USD550) in Lot 189 in the Collectibles Auction Asia (CAA) Auction 5/2015 held on 18 April 2015 at Landmark Village Hotel, Singapore.
Obv: Sultan Alaudin
Rev: Khalifatul Mukmin
weight : 0.53gm
Dim : 12mm
Rarity : RR ( ref SS2)
Market Price : USD550