Deep dive knife by Siebe Gorman & Company London 1910.  This specialty knife is made of brass or bronze with a bakelite hilt used by British deep sea divers.  Made by the Siebe Gorman company that specialized in maritime engineering and diving equipment such as diving helmets, breathing apparatuses and others. This rare deep sea diver knife is in very good condition, showing the crest of the manufacturer which not all models feature.  The other side of the hilt read: "Siebe Gorman and Co. Ltd. Submarine Engineers London (Patent)".  This was probably a presentation knife. Dimensions: Knife length (without scabbard): 33.5 cm Blade: 19.5 cm Hilt: 14 cm Scabbard: 21 cm Total length: 35 cm