Owner Comments:
Azores 300 Reis (1887) Luis I, Crowned G.P. countermark on 1751 Brazil 320 Reis of Jose I
KM-not listed; Gomes-24.12. Crowned G.P. countermark within incuse circle. Issued by decree o 31 March 1887. On 1751 Brazil 320 Reis of Jose I. The host coin is charmingly toned with moderate, even wear. The countermark is fairly well centered on the obverse and reasonably well punched.
Only two graded by NGC, both VF30.
Also a handful of others punched on various other coins.
PCGS has one coin graded countermarked on a British florin in XF45, and another countermarked on a Portuguese 1763 200 Reis graded VF25.
It seems that all of these (1887) countermarked coins are scare to extremely rare.
Decree of March 31, 1887
The second decree ordained that all foreign silver and copper coinage circulating in the Azores was to be countermarked with a crowned G.P. (Govern now Portuguese) within a circle. These were eventually to be replaced or exchanged by the current Portuguese coinage upon their entry into the public treasury. This countermark for general use is found on a variety of Portuguese, Brazilian, and foreign issues.
This countermark has been heavily counterfeited and should be approached with caution.