The coin was made in Zeeland in 1640. One side has the image of a lion facing left, holding a sword up with one arm, and a bundle of arrows with the other. The other side has the inscription Zeelandia 1640 on it.
This coin is worth 2 stuvier. In the De Dagregisters van het Kasteel Zeelandia, an entry on June 17 1654 said that in order to combat the locusts swarm, the governor issued that anyone who brings 1 kati (jin) worth of locusts can be rewarded with 1 stuvier silver coin. So if one person catches enough locusts weighing 2 kati would be rewarded with a coin similar to the one discovered.
The locusts of the 1640s and 1650s eventually brought down the Ming government, which led to Koxinga driving out the Dutch from Taiwan in 1662.
According to that paper, there was a Dutch Scheepjesschelling found embedded in an Amis body chain decoration. That one had the inscription of MO:NO:ORD:HOLL:ET WESTFRI:, which means something like Minted by the order of the parliament of Holland and West Friesland. That coin was minted in 1713. I’m not sure how that coin got to Taiwan, since the Dutch left Taiwan much early than that.
This coin and the one unearthed at the site of Sinckan are the only two Dutch coins found in Taiwan.
I guess it just meant that even though the Dutch was present in Taiwan for much longer, 44 years all together (1624–1668), it was the Spanish dollar that’s more widely circulated in the region even well after both European powers left the island.