Watch List notes:

NETHERLANDS EAST INDIES: Willem I, 1815-1840, AE stuiver (13.66g), 1818, KM-235, Cr-713, "bonk" type, Kingdom of the Netherlands issue, nice strike but date unclear, VF, ex Charles Opitz Collection. Starting from 1796, the mint in Batavia began to produce heavy 'copper bonk' (bonk being Dutch for 'large piece') coinage formed from long copper bars imported from Japan, stamped with the denomination and date were produced. The coins exhibited significant variation in weight, and were crudely made.

Estimate: 75-100 USD