This particular Type XX is accompanied by an official Breguet attestation confirming its archival registration under no. 21490. According to the manufacture’s records, the watch features a black dial with 15-minute and 12-hour totalizers together with the highly desirable retour-en-vol (flyback) function, allowing instantaneous chronograph resetting and restarting. Originally developed for military and aviation use, the Type XX has become one of the manufacture’s most iconic tool-watch designs. Its balanced tri-register layout, aged luminous Arabic numerals and utilitarian character remain highly representative of the golden era of professional pilot chronographs.