The Breitling Navitimer B01 Chronograph 43 Swissair AB01211B1B1X1 features a 43 mm stainless steel case with a black dial and contrasting silver subdials. It is powered by the in-house Breitling 01 self-winding mechanical movement, offering a power reserve of approximately 70 hours. The watch includes a chronograph function with 1/4th second, 30-minute, and 12-hour counters, and a date display. The bidirectional rotating bezel incorporates a slide rule. The caseback is transparent sapphire crystal with a printed Swissair logo. Water resistance is rated at 3 bars (30 meters). The watch is presented on a black calfskin leather strap with a tang-type stainless steel buckle. Reference number: AB01211B1B1X1.