[RJay]

These guns were made primary in France, Spain and Belgium, the are very popular in South America for self defence among the poorer class, being that your father lived in South America the odds are it is indeed Spanish. As Alpo stated, yours is in very poor condition and more of a relic than a firearm. I think a hundred would be very generous. It could be chambered for the obsolete 12 MM round, in any case it does not look safe to shoot. Sorry about that.