The Böker Annual Knife 1991 – more than a treasure, more than a collector's item, more than just a knife! A truly exceptional investment. This year's knife is deeply rooted in tradition. Blade length 80 mm. It features 300 layers of Damascus steel work by Manfred Sachse, and is crafted from the exceptionally precious Amboyna steel, which grows as tubers on ancient trees in Burma. These rare tubers can be harvested every 10 years – without harming the tree. As always, the annual knife is delivered in an elegant wooden box.