6 2/3 Riksdaler Banco

Sveriges Rikes Ständers Bank — the precursor to Sveriges Riksbank — issued this note during a period when Swedish monetary denominations were still tied to the baroque fractional arithmetic of the riksdaler system, where banco, riksgälds, and specie values all floated against each other at legislated but contested rates. The 6 2/3 riksdaler denomination is not an eccentricity; it equals precisely one-third of 20 riksdaler banco, a clean fraction within the internal accounting logic of the period.

The banco designation mattered. Riksdaler banco was the more stable of the competing units, anchored to the Riksbank's own books rather than the state debt certificates underpinning riksgälds notes. Sweden's currency unification in 1855, which collapsed these parallel systems into a single riksdaler riksmynt, effectively ended the rationale for this denomination.