The 900th anniversary of the first King of Poland was in 1925. To celebrate the occasion, a Gold 10 Zlotych was issued. This coin is a one year type. The reverse depicts the left facing bust of King Boleslaw I. The obverse depicts the national arms. This is one of just 150 coins that have been graded MS-63 by NGC! Each coin contains .0933 oz Gold. Listed in Krause as Y#32.