The Breitling Classic AVI Chronograph 42 Mosquito, reference Y233801A1B1X1, features a 42mm stainless steel case with a bidirectional ratcheted bezel. It is powered by the self-winding mechanical Breitling Caliber 23 movement, offering approximately 48 hours of power reserve. The black dial includes luminous hands and Arabic numeral hour markers, along with three sub-dials for chronograph functions. A cambered sapphire crystal with anti-reflective coating protects the dial. The watch is water-resistant up to 100 meters and comes with a brown calfskin leather strap secured by a stainless steel folding clasp.