This is a Seki Cut Oceanic dive knife made by Hattori circa 2000. Made with the precision you would expect from this renowned maker, it features a sturdy 4.25 inch blade with serrated top edge. It measures 9 inches overall and comes with a molded dive sheath with straps. Ichiro Hattori is one of the most widely known Seki master knifemakers, producing knives for G96, Valor, Kershaw, Browning, Fallkniven, Cold Steel and others over his extensive career.