About the Otter Mercator K55K Black Cat Pocket Knife
The Otter Mercator K55K "Black Cat" Pocket Knife combines one of Germany’s most enduring folding knife designs with its classic, historically significant appearance. Produced in Solingen, Germany, the Mercator has been trusted for generations for its slim profile, practical design, and reliable everyday performance. This iconic edition features a black powder-coated steel handle adorned with the distinctive gold-stamped K55K cat logo, offering exceptional durability while preserving the rugged, utilitarian character that has defined the Mercator for over a century.
Featuring a 90 mm stainless steel blade (1.4034), the Mercator K55K offers excellent edge retention, corrosion resistance, and dependable cutting performance for everyday carry (EDC). Its slim construction allows it to slip comfortably into a pocket, while the secure backlock mechanism provides confident operation during use without adding unnecessary bulk.
Handmade by Otter Messer in Solingen, Germany, this pocket knife reflects more than a century of traditional craftsmanship. Combining premium materials, timeless design, and dependable everyday functionality, the Otter Mercator K55K Black Cat is built to be carried, used, and appreciated for years to come.
Experience Otter Messer Craftsmanship
Discover how Otter Messer continues the knife-making traditions of Solingen, Germany, in this official workshop video with English subtitles.
Official Otter Messer video highlighting the traditional craftsmanship and manufacturing process behind the Mercator knife.
