hen Swiss luxury watchmaker De Bethune recently released the DB28XP Kind of Blue Tourbillon Sapphire, the name might have caused confusion in some quarters. The $315,000 wristwatch could very well be the most spectacularly blue timepiece ever devised; in De Bethune’s nomenclature, Kind of Blue references the almost miraculous metallurgic coloring technique developed by brand founder and master watchmaker Denis Flageollet. While experimenting with balance wheel treatment, Flageollet inadvertently discovered that titanium heated past a scorching 700 degrees Celsius (1,292 degrees Fahrenheit) will
