Breitling Callisto ref. A77346: quartz-driven mid-size sports model produced in the mid-to-late 1980s. 35 mm stainless steel case, slim profile, sapphire crystal, 100 m water resistance. COSC-certified quartz movement. Dial colours: black, blue, silver. Positioned as a unisex sports-luxury offering during Breitling’s revival period.