The Yssingeaux (pronounced "e seɪn jo") is named after its birthplace of "Yssingeaux" a village in the Auvergne-Rhône-Alpes region of France. The version of the knife you see today was baptized Yssingeaux around 1920 but was also found in slightly different formats since the late 1800s under the name ""Issoire", "Bourbonnais (1890)", "Façon Chabrol (1908)" and "Le Basque (1912)". Today, Fontenille Pataud also offers a slightly, more contemporary version of this knife that features a lock back system named "5 Coqs".

Collector Series: This exclusive model features a Damascus blade and a hand-filed spiraled handles treaded with solid sterling silver.

Technical aspects: This knife features a solid hardened blade stop to help prevent the blade's edge from making contact with the inner area of the spring. This knife's handle is progressively wider toward the bottom. This characteristic provides a safer grip.

Handle Material: Horn Tip from domestic cattle. The tip of the horn is the hardest and most durable, Inferior horn handles are made from the bottom of the horn which will warp with time.
Blade: 3 mm Björkmans Twist™(DS93X) 160 layers pattern Damascus by Damasteel of Sweeden
Plates: 1.5 mm stainless.
Hand file Spring: 3 mm stainless with genuine Mother of Pearl Inlay - Hand file 
Blade Size: 8.8 cm (3.45")
Handle Size: 11 cm (4.33") 
Open Size: 20 cm (7.80 ") 
Weight: ~ 86 grams (3 oz.)

Consider this: This knife is entirely handmade in Europe's capital of cutlery "Thiers." The “Gilles®” Fontenille Pataud collection of knives are considered by many to be some of the best pocket knives money can buy. All Knives offered by Gilles are entirely made by a single craftsman from start to finish ensuring pride of ownership of the final piece. 100% Made in France

What's Included: Pocket knife - Leather Sheath - Numbered Certificate - Warranty & Repair Support 

 We Recommend the use of Tuf-Glide Oil Free Lubricant 1/4 oz Pen.
Periodically place a couple drops of lubricant on the axle of all moving parts.
More details here - $8.95