In addition to the souvenir sheet, an exclusive special issue will appear as a crypto stamp with Blockchain Technology, in which the viewer can learn more about the life and work of the Princess. The special issue "H.S.H. Princess Marie" (retail price: CHF 80.00) will be issued in a classy-looking folder with high-relief and foil embossing. The stamp sheet, finished in metallic copper colours, is embedded in fine velvet and shows the coat of arms of the principality as well as the initial "M" next to the portrait of the Princess. With this special issue, Philately is paying its last respects to H.S.H. Princess Marie and honouring her social commitment in Liechtenstein and beyond its borders.