Navy Divers Knife Mark V. This is the classic United States Navy standard divers knife, aka Mark V knife. This knife is in like new condition fully polished condition. This knife was made by DESCO (Diving Equipment & Supply Company). The brass scabbard is stamped DESCO. The wood handle, stainless steel blade, leather strap, etc, are in like new condition. The brass is free of any dents. Small blemish on brass side that may be polished off. Also included are (2) Mk-3 Navy Combat knives w/sheaths. One in new boxed condition and other in great condition, never used.