Lum-Tec Mens M-Series Bronze Automatic - Brown Dial - CuSn8 Bronze Case - 44mmOwn a one of a kind timepiece with this M Series Automatic watch. Its special solid CuSn8 Bronze case will develop a patina over time. Each case is unique and will tarnish differently. This corrosion actually protects the metal underneath. It can be polished back to new or left to take on its own unique character. LUM TEC MDV 8 layer vintage tone luminous application Japan Sii NH35 automatic movement Brown dial Case width 44mm excluding crown