10 Rupiah

The Government of Sumatra issued these notes from Bukittinggi, the highland town in West Sumatra that served as the provisional capital of the Republic's Sumatran administration during the independence struggle against the Dutch. Bukittinggi — formerly Fort de Kock — became the administrative and logistical center after the Dutch reoccupied Jakarta in late 1945, and much of the Republican civil and military apparatus on the island operated from there through the late 1940s.

Notes printed locally under wartime and near-wartime conditions rarely met metropolitan production standards, and S185 is no exception — paper quality and ink consistency vary noticeably across surviving examples. The series was a practical necessity, not a deliberate monetary architecture.