A vintage Breitling Avenger Chronograph GMT watch, model number A24315101C1A1 (Ref: 1212653). Features include a chronograph function with second hand timing, 24-hour tachymeter scale for speed calculations, dual time zone display allowing simultaneous viewing of two time zones, GMT hand and date indicator. Known for Swiss mechanical movement, high-quality materials including sapphire crystal glass, water resistance up to [specify if known] bar or atm (but not provided, so omit), robust design suitable for various activities, bold markers ensuring readability, distinct Breitling branding with characteristic style.