33⅓ Riksdaler Banco / 50 Riksdaler Riksgäld

This denomination reflects a genuinely awkward moment in Swedish monetary history. The Riksdaler existed simultaneously in two competing forms — Riksdaler Banco, issued by the Riksbank and backed by silver, and Riksdaler Riksgälds, issued by the National Debt Office and trading at a discount. The fixed exchange rate between them was 3:2, which is precisely why 33⅓ Riksdaler Banco equated to exactly 50 Riksdaler Riksgälds — the dual denomination printed on a single note was not a curiosity but a functional necessity for daily commerce.

Sweden unified the two currencies in 1855, after which this note type was retired. The fractional denomination made sterile sense on paper; in practice, shopkeepers and merchants had been doing the conversion arithmetic for decades.