(1) Sapphire is a kind of natural diamond, which has high anti-wear and anti-corrosion effects after being synthesized with alumina. Hardness is 2200-2300 domain (seven times the hardness of stee...
After more than 20 months and countless hours of design, Tag Heuer introduced the concept of the Monaco V4 watch. That was back in 2004. The revolutionary concept timepiece changed the what we kn...
