Watch List notes:

JOHORE: Sultan Abdullah Shah, 1615-1623, AV round mas (2.51g), NM, ND, SS-11, Prid--, Arabic legends: sultan 'abd Allah shah // khalifat al-mu'minin, flowery pattern around on both sides, EF, RRR. Estimated that fewer than 20 examples are known of this type. We found none listed on CoinArchives.

Estimate: 2,000-2,400 USD