Poland – Henryk Sienkiewicz – 100 Zlotych – 1977 – Silver Proof Pattern – KM PR299 – Stamped Proba, designating the coin as a Pattern limited to a mintage of 3,000. 32 mm in diameter, contains 16.6 grams of .625 silver for an actual silver weight of 0.334 oz. Sienkiewicz was a Polish journalist and Nobel Prize-winning novelist.