BREITLING Callisto: chronograph wristwatch ref. 80520, 1990s

manual winding mechanical chronograph with water-resistant steel case. White dial with three gold-edged chronograph counters, gold hands with luminous treatment, luminous indexes and black printed graphics. External unidirectional rotating bezel graduated to 60 for decompression time, with gilded riders. Flat sapphire mineral crystal. Original push-buttons and crown. Mechanical manual winding movement stamped Breitling. Black generic strap with generic steel buckle.The case back has: Breitling logo and writing - Swiss made - reference 80520 - stainless steel - serial number 1009.
Case dimensions: 36 mm (excluding crown) x 40 mm (from lug to lug).
Item condition grading: ***** excellent.
Without papers and box.