Omega Constellation Co-Axial Master Chronometer 29mm Sedna Gold Pink Diamond Dial 131.55.29.20.99.006

The Omega Constellation is one of the most storied lines in Swiss watchmaking, introduced in 1952 as a symbol of precision and elegance. Over seven decades the collection has evolved from bold tool-watch proportions to refined, jewellery-forward expressions, always anchored by Omega's commitment to certified accuracy. The 29mm case size positions this reference as a quintessential ladies' watch, sized to sit with perfect grace on a slender wrist while still making an unmistakable statement.

The case and bracelet of reference 131.55.29.20.99.006 are fashioned entirely from Sedna Gold, Omega's patented 18-carat rose-gold alloy engineered to resist fading and maintain its warm, sunset hue far longer than conventional rose gold. The alloy's unique composition gives the watch a richness that photographs cannot fully capture; on the wrist it glows with a depth that shifts subtly under different light conditions. Paired with the integrated Sedna Gold bracelet, the watch achieves a monolithic, jewellery-like presence that few dress watches can rival.

The dial is set with pink diamonds, transforming the traditional Constellation chapter ring into a field of colour and light. Each stone is individually hand-set, meaning no two examples are precisely alike, and the interplay between the warm Sedna Gold surround and the cool sparkle of the diamonds creates a visual tension that is unmistakably luxurious. The diamond-set bezel continues this theme outward, encircling the dial with an unbroken halo of brilliance that reinforces the watch's fine-jewellery credentials.

Beneath the case, the movement is Omega's Co-Axial Master Chronometer calibre — a movement family that has earned the highest certification awarded by the Swiss Federal Institute of Metrology (METAS). Master Chronometer certification guarantees performance to a standard that surpasses traditional COSC chronometer requirements, including resistance to magnetic fields of up to 15,000 gauss. The Co-Axial escapement reduces friction compared with a conventional lever escapement, extending service intervals and preserving long-term accuracy, so the mechanical integrity of this watch is as serious as its aesthetic.

For a collector or gift-buyer considering reference 131.55.29.20.99.006, the value proposition is multifaceted: it is a certified precision instrument, a Sedna Gold jewellery piece, and a piece of Omega heritage all at once. The 29mm proportions make it equally at home at a formal event or worn daily against the wrist in understated luxury. Whether you are buying for yourself or presenting it as a significant gift, this Constellation delivers on every dimension that defines a truly great watch.

Bizak & Co. offers this reference brand new, with the full backing of an authorised supply chain and our commitment to best pricing. Our team of specialists is available to answer questions about specifications, provenance, and delivery, and we welcome the opportunity to help you acquire this extraordinary piece with complete confidence. Reach out through bizakandco.com to begin the conversation.