Watch List notes:

SIAK: tin pitis (2.35g), inscription in very corrupt Sumatran-Javanese "Sultan Siyak" imitating Banten (Bantam) issues with hexagonal central hole, VF to EF. Michael Mitchiner has read the text as "Sultan Siyak" in Javanese script. He dates the coin as circa 1610 to the 1620's. After examining many of these tin issues, we could not find another published similar example online of this inscriptional variety.

Estimate: 75-100 USD