The Constellation Observatory marks a defining moment in OMEGA’s pursuit of precision.

This 39.4 mm polished-brushed model in 18K Sedna™ Gold features the distinctive faceted “dog-leg” lugs accompanied by a bezel with clear-cut facets. It is presented on a dark burgundy leather strap on polished buckle.

The “Pie-Pan” dial is a reminiscent of the original 1952 Constellation with dodecagonal facets, with applied OMEGA logo and Constellation star. The 18K Sedna™ Gold dial is presented with sun-brushed centre and opaline facets with 8 lustrous hand-guillochégrooves. The revamped kite-form indexes are fully diamond-polished, matched with diamond-polished dauphine hands, crafted from 18K Sedna™ Gold.

The watch is driven by OMEGA’s calibre 8915, the world’s first two-hand watch to achieve Master Chronometer certification approved by METAS. The movement is visible through the sapphire crystal caseback, revealing a 18K Sedna™ Gold skeletonised rotor embellished by an applied medallion featuring the laser-engraved Constellation Observatory emblem in contrasting finish. The watch is presented in a special marquetry box featuring the Constellation Observatory emblem.

Features
Anti-magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).
Chronometer: Label given to a watch which has been successfully tested by an accredited and independent laboratory in order to receive a certificate compliant with the chronometer ISO 3159 standard.
Master Chronometer Certified: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).
Time zone function: Allows the hour hand to be easily adjusted to different time zones without stopping the watch.
Transparent caseback: A transparent caseback - frequently made of sapphire - makes it possible to see the movement inside the watch.

Technical Data
Reference: 140.53.39.21.99.002
Between lugs: 19 mm
Lug‑to‑lug: 47.20 mm
Thickness: 12.23 mm
Case diameter: 39.4 mm
Case: Sedna™ gold
Dial colour: Pink
Crystal: Domed, bevelled and scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
Water resistance: 3 bar (30 metres / 100 feet)
Total product weight (approx.): 96 g
Calibre: OMEGA 8915 Sedna gold
Movement type: Self winding
Power reserve: 60 hours

Strap
Strap color: Burgundy
Strap type: Alligator
Strap surface: Alligator leather
Strap underside: Grained calf leather
Buckle type: Pin buckle
Buckle material: Sedna™ Gold