This Ashtray has a crown and wings with letters that look like KLM so I think It could be a airline souvenir. The ashtray is in good used vintage condition
Delftware or Delft pottery, also known as Delft Blue, is a general term now used for Dutch tin-glazed earthenware, a form of faience. Most of it is blue and white pottery, and the city of Delft in the Netherlands was the major centre of production, but the term covers wares with other colours, and made elsewhere. Wikipedia