Royal Treasury Bonds (Real Erário)
The Royal Treasury Bonds (Apólices do Real Erário) were public debt instruments issued by the Portuguese Crown between the 18th and 19th centuries to finance the State during the Pombaline and post‑Pombaline periods, forming key documents in the history of Portuguese public finance. Featuring royal validation stamps, varied denominations and manuscript dates, these pieces are highly valued by collectors for their rarity, historical relevance and their connection to the early development of Portuguese paper‑money and fiscal administration.