These are vintage KLM Royal Dutch Airlines Business Class tile coasters manufactured in the Netherlands during the 1980s. Before 1994, KLM gifted these ceramic, blue-felt-backed tiles to business class passengers, whereas first-class (Royal Class) passengers received the famous miniature Delft canal houses. The backs have traces of cardboard stuck to them but still all sit nice and flat and there is the obvious used condition plz see photos for reference thank you
