Mercator-German pocket knife

This is a pocket knife that my daddy gave me over the summer. He has carried this around in his pocket for 25+ years. It was his favorite knife and I was so shocked that he parted with it. One of the things that my dad loves to do the most is trade knives, guns, and etc. He has a great collection of knives and almost anything a country boy could want.
I don't really know that much about this piece but that it has an animal that I think is a fox, the insignia K55K (the last K is backward) and Mercator-Germany printed on the side. This is the sharpest pocket knife I have ever seen. (no pun intended)