1871 Spain 5 Pesetas. BUT what is the Counter Stamp?

These kind of coins are usually outside my interest. However, this one came as part of a package.
The 5 pesetas on the bay.. NONE of them have this counter stamp..
can anyone help please.
the coin is silver.


The 5 pesetas on the bay.. NONE of them have this counter stamp..
can anyone help please.
the coin is silver.



Today is the first day of the rest of my life
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25 Grammes - silver 900/1000 - diameter 37mm
GP = Government Portuguese , used on 8 reales 18th century Mexican pillar dollars , I've never seen one, on a 5 peseta "modern"" spanish coin.
* Amadeo I , an italian prince, invited to become King of Spain, after 2 years he returned to Italy saying: the spanish people are impossible to rule.
In this particular forgery the counterstamp is probably on the die itself.
Jose