The Mark II is one of the best selling knives of all time. First introduced in 1966, this tactical knife is serialized for collectors. This one has a blued double edged blade, the bluing is not original, .227" blade stock and .963" blade depth, hidden tang construction with a black/grey aluminum handle. This knife has a 5 degree cant on the blade so it rides closer to the body when worn. This knife is Serial #XX3737 and was made in 1986. Comes with a brown leather sheath. Has some wear on the handle finish, some scratches and light patina, otherwise good condition for its age.