Piece with very nice details and luster. A fractional dash variety in mint alloy with a fractional 211/625.
A coin formerly probably in a jeweler's shop, serving as a sampler, as indicated by the nailing of the 800 silver hallmark several times and the single silver hallmark of 84 goldsmiths.
Obverse: crowned escutcheon with the coats of arms of the Crown and the Grand Duchy of Lithuania, above it in a half-arc the legend:
KROLESTWO POLSKA;
Reverse: in an oak wreath an inscription 5/ZŁOT-/POL-, under the wreath initials K-G- Karol Gronau`a - the manager of the Warsaw Mint in 1829-1834, in the rim a legend divided by stars:
17 211/625 WITH A FINE- PURE- KOL- - YEAR 1831;