Winnlex,
It is an Argentine knife made by Broqua Scholberg & Cia Rosario Santa Fe.
This type of knife if generically known as a "Cuchillo De Campo", translatable as a field knife.
Here's a thread in Spanish on this brand (use Google translator):
http://www.armasblancas.com.ar/foros...marca-sol.html
If you are stuck with anything just ask.
Cheers
Chris Evans