⅔ Riksdaler / 2 Daler Silvermynt - Gustav III

Gustav III introduced this denomination as part of his 1776 monetary reform, which attempted to rationalize Sweden's notoriously convoluted dual-currency system — one running in Riksdaler, the other in Daler Silvermynt, with an exchange rate baked directly into the face value. The fraction itself is the reform: ⅔ Riksdaler and 2 Daler Silvermynt are the same coin, the equivalence printed in metal rather than explained on paper.

The reform was also politically loaded. Gustav had seized autocratic power just four years earlier in his 1772 coup against the Riksdag, and reasserting royal control over monetary policy was part of the broader consolidation. This issue ran only two years before the specification was adjusted.