A rare variation: the letters N in a mirror image and without a crown above the Vasa coat of arms.
The shillings with crowned letters S-R, minted between 1622 and 1623, are coins that, according to current findings, are attributed to Warsaw. The mysterious mint was known to numismatists as early as the 19th century, but it is still impossible to determine where it was located, in what years it operated and what coins it minted.