(TrendHunter.com) The Porsche anniversary chronograph marks 90 years with 911 GT3-inspired design through a limited-edition mechanical timepiece. The watch references the 911 GT3 through its dial layout, color…(TrendHunter.com) The Porsche anniversary chronograph marks 90 years with 911 GT3-inspired design through a limited-edition mechanical timepiece. The watch references the 911 GT3 through its dial layout, color…