The product shown is a commemorative Polish 100 Zlotych coin from 1966. The coin features the busts of Mieszko I and his wife, Dąbrówka, and was issued to commemorate the millennium of the Polish state.

• The coin is made of silver with a fineness of 0.900.
• It is a "Proba" (proof or trial strike) coin, which means it was not intended for general circulation.
• The coin has a weight of approximately 20 grams and a diameter of 35 mm.
• Similar coins can be found for sale on auction sites like eBay and numismatic websites, with prices varying based on the coin's condition and grade.