TAG Heuer debuts tourbillon carbon-nanotube hairspring
By: iadxb : January 17th, 2019-12:40
This was first announced about two years ago as a feature in Zenith Defy El Primero 21, but when the watches started getting delivered later in 2017, they were equipped with regular metallic hairsprings. Clearly LVMH had not yet perfected the technology a...