The product is a very rare and unique 1524 1/2 Groat coin from Poland, featuring King Sigismund I. It is made of silver with a fineness of 0.6, and has been certified by NGC as grade VF30. The coin is a variety with a reversed 4, making it a valuable and sought-after piece for collectors. This coin from the 16th century is a valuable addition to any numismatic collection.