This topic was posted in the Francuski forum.
J’ai trouver ce matin 5 pesos noir cela est il possible
To me it looks like environmental damage, either that or someone playing with chemicals.
Something like this coin on the left (Image just from the google) :
Hope that helps,
J
Bonjour
Rogner tes photos au plus près de la monnaie et préciser les poids diamètre métal
» Forum policy
Used time zone is UTC+2:00.Current time is 20:52.