Replica. The Prague groschen (Czech: pražský groš, Latin: grossi pragenses, German: Prager Groschen, Polish: Grosz praski) was a groschen-type silver coin that became very common throughout Medieval Central Europe. It is a silver coin with on the obverse the legend DEI GRATIA REX BOEMIE (`By the grace of God the King of Bohemia`) and on the reverse GROSSI PRAGENSES (`Prague groschen`). The weight of the coin varies between 3.5 and 3.7 g with a fineness of 933/1000 of silver. The groschen was subdivided into twelve parvus (`small`) coins with a Bohemian heraldic lion sign on the obverse.