150 Réis - José I (Curved Zones; Province of Minas Gerais; Rio de Janeiro)

Struck in 1754 during the reign of King José I, this 150 Réis coin is a quintessential artifact of colonial Brazil’s currency system. It was minted in Rio de Janeiro to facilitate trade within the Captaincy of Minas Gerais, an area then central to the Portuguese Empire's economy due to its vast gold and diamond deposits. The coin serves as a physical testament to the colonial administration's efforts to regulate local commerce and standardize the circulating medium during a period of intense resource extraction.

The design of this issue, notable for its 'curved zones' characteristic, reflects the aesthetic and technical conventions of mid-18th-century Portuguese numismatics. These coins were produced using manually operated screw presses, which often resulted in the distinctive field variations observed by collectors today. While the utilitarian nature of these coins meant they were heavily circulated and often worn in daily use, they remain valued by historians for their role in the socio-economic life of the Portuguese Atlantic world.