IWCさんのインスタグラム写真 - (IWCInstagram)「Grade 5 Titanium. In 1980, #IWCWatches unveiled its first wristwatch with a case and bracelet made of titanium. This milestone marked the start of developing IWC’s materials expertise, which has remained unique to this day. Since then, the company has continuously expanded and refined its expertise in titanium processing. The titanium grade 5 alloy used for the #IWCIngenieur Automatic 40 is around 45 per cent lighter than steel, highly resilient and skin-friendly. However, titanium is also very tough and extraordinarily difficult to machine. The production of the case and bracelet, together with the elaborate finishing of the components using processing techniques such as polishing, satin-finishing or sandblasting, represents a master stroke of engineering. #FormUndTechnik #WatchesAndWonders2023」4月6日 17時00分