This stamp is an issue of PostNL, produced by the Royal Dutch Mint. It is the second time that a silver stamp is issued nationally. The first time was in honor of the last guilder stamp in 2001.
The design consists of a double portrait of the current Queen Beatrix and upcoming King Willem-Alexander in three-dimensional carving. The stamp is available for the registered tariff and available at the PostNL post offices, online via postnl.nl/zilver3d and postkantoor.nl.