The Collaborative International Dictionary of English v.0.48:

Krone \Kro"ne\ (kr[=o]"n[asl]), n. [Dan.]
   A coin of Denmark, Norway, and Sweden, of the value of about
   twenty-eight cents (in 1913). See Crown, n., 9.
   [1913 Webster]

WordNet (r) 3.0 (2006):

krone
    n 1: the basic unit of money in Norway [syn: Norwegian krone,
         krone]
    2: the basic unit of money in Denmark [syn: Danish krone,
       krone]