50 Réis - Afonso VI Countermark 'Crowned SO' over 'XXXX Réis'

This piece belongs to a chaotic monetary episode in mid-seventeenth century Portugal, when the Crown undertook a systematic revaluation of existing coinage rather than striking fresh issues. Worn or surplus 40 Réis pieces were countermarked and restruck to circulate at an elevated 50 Réis denomination — a fiscal expedient driven by the financial strain of the Restoration War against Spain, which had been grinding on since 1640. Afonso VI's government needed liquidity without the cost of a full new mint run.

The double-authority nature of the mark — "Crowned SO" punched over the existing "XXXX Réis" — means the original host coin remains partially legible on most examples, making die attribution unusually traceable for a countermark issue.