The TimeWalker Pythagore Ultra-Light Concept is one of the lightest mechanical timepieces in the world – at a mere weight of 14.88 grams. Creating a timepiece this light required the use of a special composite material called “Innovative Technical Revolutionary Resin” (or ITR) combined with Kevlar/carbon to create the case middle, bezel, back, and crown. The material is extremely difficult to manufacture, although the advantages of using this high-tech resin results in a case that it is eight times lighter than steel and four times lighter than titanium, according to Montblanc. The case measures 40 mm x 9.7 mm. Notably, the horns of the watch are made of titanium, which have been skeletonized for further weight reduction, as well as satin-finished and treated with a black DLC coating that provides a contrast to the smooth matte finish on the bezel.