I believe demeykelly is from Aruba, so hopefully he has a lot to add to this topic.
The Netherlands Antilles consist of two groups of islands in the Caribbean:
- the ABC group: Aruba, Bonaire & Curaçao located near the northwestern coast of Venezuela (who claimed the islands a few times in history)
- the northeastern group: Saba, St Eustatius and half of St Martin (shared with the French)
Most of the monetary history is shared, so I grouped all of this together.
The Dutch settled these islands as trading posts for the West Indies Company in the early 1600's, modeled after the successful United East Indies Company (VOC in Dutch). In 1954 the Netherlands Antilles be came a separate country within the Kingdom of the Netherlands. In 1986 the status of Aruba was upgraded to the same level. Very recently there was a new reform that put the smaller islands back under Dutch rule and gave Curaçao larger autonomy. A monetary reform was planned as well but I am not sure what the status is of that now. As fas as I know, the Netherlands Antilles Guilder is still used next to the Florin in Aruba.
Early 19th century there were some stiver coins of Curaçao, but the Dutch Guilder was mostly used. In 1900 & 1901, a 1/10 & 1/4 Guilder coins were introduced specifically for 'Kolonie Curaçao'. These are pretty rare, but I once snatched a VF 1/4 Guilder for less than 10 EUR.
It was not until World War 2 until new coins were introduced for the Netherlands Antilles. In 1944, the US mints produced 1, 2 1/2 and 5 cents as well as silver 1/10, 1/4, 1 and 2 1/2 Guilders with similar designs and specs as homeland currency. The currency rate was 1.79 NAF to 1 USD, a rate that still exists today. Homeland Dutch Guilders were devalued to 3.60 NLG to 1 USD following WW2, which brought the value of 1 NAF close to 2 NLG. In the decades that followed the Dutch Guilder followed a lot of Deutschmark revaluations until a Dutch Guilder even reached parity to NAF. With the recent devaluation of euro, that has been reversed a bit.
From 1954 coinage for the newly created Netherlands Antilles, with designs similar to pre-war Dutch coinage. After 1970 silver was abandoned and a new series introduced. With Beatrix crowned in 1980, initially only the portrait was updated but in 1989 a whole new series was introduced. In 2014 the portrait was updated for the new king Willem Alexander for the 1, 2 1/2 and 5 Guilder coins.
In 1986 Aruba introduced its own coinage at par with NAF. Especially the 5 Florin coins are hard to find in unc or it's just that I've only seen people asking 8 euros or more for it.
Coins of Curaçao:
https://en.numista.com/catalogue/curacao-1.html
Netherlands Antilles:
https://en.numista.com/catalogue/antilles_neerlandaises-1.html
Aruba:
https://en.numista.com/catalogue/aruba-1.html
BES Islands:
https://en.numista.com/catalogue/bes-islands-1.html




