Breitling Duograph ref. A78021: introduced in the early 1990s as part of the Navitimer/Chronomat family. 39–40 mm stainless steel case, sapphire crystal, 30 m WR. Movement: Breitling Caliber 78 (modified Valjoux 7750 with rattrapante module), COSC certified. Functions: split‑seconds chronograph, 12‑hour recorder, date. Produced in limited quantities.