30 Réis - Maria II Countermarked over 1/2 Tanga

Portugal's countermarking program in Goa during the early 1850s was a practical response to chronic small-change shortages in the territory. Rather than strike new coins, colonial authorities punched existing Indo-Portuguese 1/2 Tanga pieces — themselves already a local adaptation — with a crowned globe mark to revalue and legitimize them as 30 Réis within the metropolitan system. The host coin's origin matters: a worn or damaged 1/2 Tanga beneath the countermark can complicate attribution, and collectors should verify the undertype before accepting any example at face value.