Circulating Piece.
A sixpence with the bust of the 1656 vintage and an A-style reverse with the narrow Wieniawa coat of arms and the beginning of the MONET legend. This exact reverse stamp was also used for the 1656 vintage, but here the last digit was corrected to 7.
The coin illustrated in the catalog of L. Ciura.
Note: the book is not the subject of the auction.