I think this is Portugese just because I have never seen the knife company.  Silverstenl Briggs.  I could be wrong.

I can't find anything in my books by that name so maybe someone can help me.

The etched blade says SILVER STEEL.

If I can get a decent pic of the tangs I will come back and add those.

They are stamped with Silverstenl Briggs and the handles are genuine bone.