Here is a coin listed at stationary auctions in Poland most likely only 1 time. At the 2nd WCN auction in 1992!
The first vintage of Karl Gustav's Elbląg shellac.
A very rare coin, described in catalogs as the highest degree of rarity - R8.
In 1656 the Swedish army enters the city for the second time in the 17th century. After a siege of several days, Elblag surrenders to the troops of Charles X Gustav and remains under their occupation until the Peace of Oliva in 1660. King Charles of Sweden, following the example of his predecessors, begins minting coins from the shekel to the orta to finance further warfare. However, this is a much smaller issue.
This ruler's shekels were minted in Elblag for only two years, in two types. The first was Swedish in character, where the reverse is three crowns. It was minted very briefly in 1656 and early 1657, and was quickly changed to a type with the city's shield and the legend SOLIDVS ELBING. And it is the combinations of the obverse stamps of both types that allow us to determine the Elblag origin of both types.
Rarity.
Silver, diameter 16 mm, weight 0.62 g.