A nice circulated piece.
A sixpence with a vintage bust typical of the 1657 vintage, but with an A-style reverse with a 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.