The CuSn8 Exotic Dial Series is made of high quality German CuSn8 Bronze. CuSn8 is the chemical composition of the metal. It is rose gold in color. It develops patina very slowly due to it's makeup. When it does get some it will polish off with a simple silver polishing cloth with minimal effort. CuSn8 Bronze is the highest quality bronze for watch making. 41mm | Automatic Japan Miyota Movement | High Quality Italian Leather Embossed with Alligator Pattern and with Distressed Look | Sapphire Crystal| Full Lume | Abalone Dial | 20ATM Water-Resistant