As for this coin, there are some errors in the words used.
Notice the Sultan is written ثلطان instead of سلطان
The word choice mu'min for singular is used instead of mu'minin for plural
My other coin is in below link
Sultan Alauddin I
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 سلطان علاالدين
Rev: Khalifatul Mukmin Shah خليفة الموْمن شاه
weight : 0.64gm
Dim : 12mm
Rarity : RR ( ref SS2)
Market Price : USD550