Thank you Aidan,
This is really helpful,
I calculated the specific gravity at home, It might be more or less 8.5.
I though it was Electrum due its goldish color and the quality of it surface.
I am trying to find a match for this same coin, this is what I was looking for, at least I can have a definitive idea about it.. I wonder if there is a way to find it, I came across many publications, but no success.
Again, thank you!