The 51-30 is a popular model from Nixon and its Chrono line have been added with a new colorway. The Leather Bone is a mature piece that uses bone leather on the wrist band that give it a formal aesthetic. Matching the wrist band is the large face in bone color as well accented by black dials and yellow second hand. Stainless steel Bezel and casing is matte black in color weighing down the watch. It is still equipped with its standard functions such as count down timer, stop watch, date display, Japanese movement and water resistance to 300m.