Analog, automatic movement Calibre 3330 (ETA Valjoux 7753 base), 31 Jewels, bitting frequency 28800 vph, power reserve ~52 hours, tachymeter function. Silver dial features gold-tone hands and index hour markers with luminous coating for enhanced legibility in low light conditions; date display located at the 6 o'clock position. Fixed green aluminium bezel is decorated with diamond set indices along its circumference. Chronograph equipped with three sub-dials: one for measuring minutes (30-minute duration), one for seconds (60-second function) and a third indicating elapsed hours (up to 12 hours). Includes lume on hour markers, minute hand and hands themselves. Sapphire crystal offers high scratch resistance and clarity protection over the dial. Yellow gold round case measures 38 mm in diameter with an accompanying green leather strap secured by a buckle clasp. The solid case back provides additional structure while being accessible for display or maintenance if needed. Watch is water resistant up to 100 meters / 330 feet, suitable for recreational swimming but not professional diving. Co-axial escapement enhances precision and reliability; certified chronometer ensuring high accuracy standards against Swiss天文时标准. Chronometer tested by the COSC institute (Swiss Official Chronometer Certification). Luxury watch style with "Swiss Made" label emphasizing quality craftsmanship.
![Omega Constellation Automatic Chronometer Diamond Grey Dial Ladies Watch [131.15.29.20.56]](https://cdn.lepodium.net/images/000/085/85042-2.jpg)
