An EXTREMELY RARE ANNIVERSARY, never listed on Onebid, in the WCN archives or in the archives of the Niemczyk Antiquarian. This piece is illustrated in the Ejzenhart_Mileer catalog under item 155. Coins of this vintage are missing from all museum collections with collections of Silesian coins. At the moment, this is the only known piece that has appeared on the market, hence our addition with the question mark UNIKAT? The coin has a quite different portrait (unknown in other years) and a minted vintage of 1690, but it is a coin with an error, minted in one of the vintages between 1674 and 1679. Probably after the error was noticed, further coins were abandoned and the erroneously minted pieces were melted down. It is possible that the offered numismatic coin is the only piece still preserved today!!!