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Omega Constellation Co-Axial Master Chronometer 29 — 131.20.29.20.05.001

Omega

Constellation Co-Axial Master Chronometer 29

131.20.29.20.05.001

Refined two-tone elegance meets Master Chronometer precision at 29 mm.

Estimated market value
$6,100
Confidence: High

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Overview

The Omega Constellation Co-Axial Master Chronometer 29 (ref. 131.20.29.20.05.001) is a dress watch conceived for the smaller wrist, pairing a 29 mm steel and Sedna gold case with a luminous mother-of-pearl dial. It sits within Omega's long-running Constellation line, which has historically balanced feminine design sensibility with serious horological credentials. The reference represents the collection's contemporary expression of that philosophy, anchored by METAS-certified movement technology.

History

The Constellation line traces its origins to the 1950s, establishing Omega's reputation for precision timekeeping in an elegant package. The modern Co-Axial Master Chronometer generation, introduced in the mid-2010s, brought the range into alignment with Omega's highest in-house standards, incorporating the Co-Axial escapement and full METAS certification. This 29 mm reference entered production in 2018, offering the Master Chronometer standard in a case size tailored to a broader range of wearers. The pairing of steel with Sedna gold — Omega's proprietary rose-gold alloy — continues a Constellation tradition of refined two-tone aesthetics.

Notable points

  • Calibre 8700 is METAS-certified to Master Chronometer standards, guaranteeing accuracy of 0 to +5 seconds per day and resistance to magnetic fields of at least 15,000 gauss.
  • The Co-Axial escapement reduces friction and wear compared to a traditional lever escapement, contributing to long-term rate stability.
  • Sedna gold is Omega's proprietary 18-carat rose-gold alloy, engineered for enhanced colour retention over time.
  • The mother-of-pearl dial is a natural material, meaning each example carries a subtly unique surface pattern.
  • At 29 mm, the case diameter places this reference among the more compact expressions of the Constellation Co-Axial Master Chronometer family.

Specifications

Brand
Omega
Collection
Constellation
Reference
131.20.29.20.05.001
Years of production
2018 – present
Case
29mm Steel & Sedna gold two-tone
Case material
Stainless steel & Sedna gold
Case diameter
29 mm
Movement
Cal. 8700
Crystal
Sapphire
Dial
Mother-of-pearl
Bezel
Sedna gold with engraved Roman numerals
Bracelet / strap
Two-tone steel & Sedna gold bracelet
Water resistance
50 m
Power reserve
50 h
Complications
Date
Type
Dress
Worn as
Ladies'
Also known as
Manhattan, コンステレーション, 星座

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