Baselworld 2018: It’s Rare To See This Observatory Certification Tag Heuer Carrera Tourbillon Chronograph
In 1897, the ‘Tête de Vipère’ mark of Besançon Observatory appeared for the first time on a precision timepiece. As a high quality guarantee of time measurement, this mark represents unparalleled precision. This certification was terminated in the 1970s and reactivated in 2006. So far only 500 watches have received …