Not often available!
The actual Gold weight of this coin is 0.0933 oz. The 900th Anniversary of the first King of Poland was in 1925. To celebrate the occasion, Poland issued a Gold 10 Zlotych. This coin is a one year type. Depicted on the obverse is a left facing bust of King Boleslaw I. The reverse depicts the national arms. This coin is graded MS-64 by NGC. Listed in Krause as Y#32.