Sint Eustatius is an island that constitutes a special municipality of the Netherlands, located in the Caribbean Sea east of the Virgin Islands. Until 2010 it was part of the Netherlands Antilles and in 1987, as in the other islands, some public card-type telephones based on the Landis & Gyr optoelectronic technology were installed. The population was a few thousand people, so the circulation of the first cards issued was only 500 copies each. These were two ordinary gray, similar to those used in the other islands, with facial values of 60 units (code 709D) and 240 units (code 709K). Other similar cards were issued in the following years and used until 1996 when the phones with optical cards were replaced by those accepting chip cards.