5 Pesetas 1870

Hello and welcome.

The counterstamp, with the GP monogram, was applied in 1887 on coins used by the Portuguese in the Azores Islands. Unfortunately, both the counterstamps and the coins themselves are highly counterfeited. The toning on this piece is very similar to the toning pattern seen on commonly encountered "Chinese" counterfeits, so that alone is making me suspicious of this one.

Here's an old thread with a much less convincing-looking fake 5 pesetas of 1871, with the crowned GP counterstamp.