Otter Mercator Knife
A piece of knife history
Built for over 140 years
Original cat logo
Stainless 1.4043 steel
Well-tried and still greatThe Otter Mercator is an absolute legend among pocket knives. Also known as the "K55K" or "Black Cat Knive", the Mercator gained international fame especially after World War II when American GIs brought the folding knives back to the US from Germany.
However, the knife - which we now know as the "Mercator" - has been manufactured since imperial times in the late 19th century and was also used by soldiers in the German Army during World War I. Since then, it has been manufactured unchanged to this day, as the company Heinrich Kaufmann & Söhne registered it in 1867 as a Deutsches Reich Gebrauchsmuster. The abbreviation "K55K" stands for Kaufmann, Hochstr. 55, Katze. The US soldiers simply called the knife Black Cat Knife, which is a bit inaccurate. While the folded sheet steel handle is completely powder coated in black, the stamped cat is hand painted in gold color, then as now. Since 1995, the knife has been faithfully built by Otter under the Mercator name, and its design has changed almost not a bit in over 140 years by now.
The backlock construction is a rather simple but extremely reliable design that can withstand harder use, but is still easy to use. The long blade is constructed of either stainless 1.4043 or - true to the original - non-stainless C75 carbon steel. The extremely flat design ensures that the Mercator is not a bit bulky in the pocket and is very easy to guide.
Otter Mercator Brass
The classic Mercator knife is certainly one of the oldest multifunctional knife concepts that is still being built more or less unchanged today. The new version now has a handle body made of brass, which gives the knife a completely new look. The blade is also made of classic, non-stainless carbon steel and shows this in use by forming the patina typical of carbon steel.