My Cousin lives on Saba and has a Flat on St Maarten and they use Netherlands Antilles Coins and Notes as its part on the Dutch Caribbean on one Side of the Island and French the Other So look for Netherland Antilles for the Dutch Side and the Euro on the French Side.
(The official currency of French St. Martin is the Euro. In Dutch St. Maarten, it is the Netherlands Antilles florin (NAf).)
https://en.numista.com/catalogue/pieces3599.html
Ian.