Elbing under Sweden, Gustav II Adolf, Groschen 1629/1620 - VERY RARE

Variety with the date written 1620, instead of 1629. In the digit "0" a clear tail is visible, as if from the digit "9 '. In the catalog of Dutkowski and Suchanek, this variety has a certain degree of rarity on R5, while such variety is unlisten in Kopick catalogue..