Historical Background and Review of the German Mercator Knife (aka "Cat Knife")

The German Mercator knife is as simple as a locking knife can get. It has been around for over 140 years and has become an immortal classic. And it is still a great every-day utility knife at a reasonable price. Here's the link to a video that was filmed at the shop of Otter-Messer, Solingen. It shows the making of the Mercator knife:    • Making of The Mercator K55K German Knife -...