AKA Specierigsdaler and daler - Danish silver coin from the 15th century. Until 1618 the only silver coin in the country.
Since it was of silver, it could be used in other countries than Denmark. In 1813 the coins started being traded in for notes, and as of 1875, it was being completely removed from the system. The term krone has been used as currency unit since then in Denmark, Sweden and Norway.