Omega Constellation Co-Axial Master Chronometer 29mm Lad
10 % below RRP
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ℹ️ 1-month trend
Price change over the past 30 days. Shows the short-term market movement — relevant if you want to buy or sell soon.
ℹ️ 4-month trend
The central metric behind the momentum score. It filters out short-term swings and shows the true, medium-term market trend of this reference.
ℹ️ Volatility
Annualised price fluctuation. Below 10 % = very stable, 10–20 % = normal, above 20 % = volatile. With high volatility the price can change quickly — in both directions. Be cautious about buying without checking the current price.
ℹ️ Momentum score
ChronoCheck's own indicator from 0 to 100, calculated from the 4-month trend, volatility and market direction.
- Above 60 — Upward trend. Good time to sell, prices are rising.
- 40 – 60 — Neutral. Stable price level, no pressure to act.
- Below 40 — Downward trend. Wait or enter at a good price.
ℹ️ Investment Grade A/B/C/D
ChronoCheck's own rating for each reference. A 0–100 point scale, made up of four weighted components:
- Momentum (40 pts) — trend strength from the momentum score.
- Liquidity (25 pts) — number of active live listings.
- Stability (20 pts) — inverse volatility — the calmer, the better.
- Source robustness (15 pts) — number of independent market sources.
- A · 75+ Trend is right, liquidity good, data broad.
- B · 55–74 Solid, but one component weaker.
- C · 35–54 Average, volatility or market breadth weigh on it.
- D · below 35 Downward or too little data — a collector's piece.
Not investment advice. Pure data analysis from aggregated market sources.
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Technical data
Omega Ref. O13128292099001 — Variants and collector names
Movement variants
- 8700 (2023–today) · 25200 bph
Bezel variants
- Constellation-29-SednaGold-Diamond-Fixed-Griffes
Dial variants
- Blue Aventurine Manhattan — Date at 6H; Omega logo + Constellation star 18K Sedna; 11 diamond hour markers; no printed numerals
- Red Aventurine Manhattan — Date at 6H; Omega logo + Constellation star 18K Sedna; 11 diamond hour markers; no printed numerals
- Constellation-29-Green-Aventurine-DiamondHM-Sedna-Date — 11 diamond hour indices (18K Sedna Gold setting), no lume, date at 6 o'clock
Crystal variants
- Saphir-Dom-AR-beidseitig-Constellation-29
Bracelet variants
- Blau schimmerndes Lederband Ref. Constellation-29-Aventurine-BlueLeather-SednaGold-Deployant
- Grünes Alligator-Lederband Ref. Constellation-29-Aventurine-GreenAlligator-SednaGold-Deployant
- Rotes Alligator-Lederband Ref. Constellation-29-Aventurine-RedAlligator-SednaGold-Deployant
The Omega Constellation 29 in Sedna Gold has a characteristic with this reference that the market consistently underestimates: Omega offers three distinct Aventurine variants — Red Aventurine Manhattan, Blue Aventurine Manhattan, and a green counterpart with no official collector name. Aventurine is natural stone, not a printed pattern. No two dials are identical, and any listing that fails to specify the variant creates confusion that costs money at the point of sale.
## What the diamond-set fixed Sedna Gold bezel says about the value of this watch
The diamond setting on the fixed Sedna Gold bezel is not an optional extra — it has been a structural cornerstone of the Constellation design since 1982. On the 29 mm case there is no rotating bezel mechanism; the bezel sits fixed, a pure jewellery-case element. Behind it, the Co-Axial calibre 8700 delivers 80 hours of power reserve — an above-average figure for a 29 mm ladies' piece. Buyers who appreciate this aesthetic pay between 9,800 and just under 11,000 euros new today, depending on the Aventurine colour.
## Which variant commands more demand on the pre-owned market — and why that matters for valuation
Red Aventurine examples achieve a premium of 8 to 14 percent over the blue variant on the German secondary market, because red comes up for sale less often and demand is more concentrated. The green Aventurine dial without a collector name is the weakest of the three in resale terms, even though the raw material is visually no less striking. Original condition of the Aventurine dial is decisive across all three variants: scratches in natural stone cannot be polished out.
Brand profile: Omega
Omega is the second most counterfeited Swiss watch brand. The Speedmaster and Seamaster are especially targeted. Pay close attention to movement details (Co-Axial) and dial textures.
- Speedmaster: The chronograph reset hand must snap back precisely to 12 o'clock — fakes stop 1–3 seconds off or wobble
- Speedmaster (Hesalite): The Omega logo is micro-laser-etched on the UNDERSIDE of the Hesalite crystal — only visible at a specific angle and in the right light — fakes omit it or place it incorrectly
- Seamaster: The wave-pattern dial must be ENGRAVED (tactile relief) — printed/flat wave lines = fake
- DON (Dot Over Ninety): small dot ABOVE the '90' on the Speedmaster tachymeter bezel — position/size often wrong on fakes
Serial number format: Omega serial number: 8-digit number on the caseback or between the lugs (on older models). Since ~2018 engraved on the caseback at 6 o'clock. Format: purely numeric. Verifiable on the Omega website with an extract from the archive.
Further sources
Buying guide: Omega Constellation Co-Axial Master Chronometer 29mm Lad
Market situation and price range
At $17,542 the Constellation Co-Axial Master Chronometer 29mm Lad sits in a segment where first owners sell regularly — clean pieces with box and papers are not uncommon. The jump from "good" to "very good" usually costs 1,000 to 2,000 euros more at purchase. You get that premium back on resale if the condition is preserved.
What to look out for when buying?
- Authenticity: The serial number and reference on the case must match the papers. A professional authenticity check of the Omega Constellation Co-Axial Master Chronometer 29mm Lad reliably rules out counterfeits.
- Condition: Check scratches on the case and bezel — professional refurbishment can leave traces.
- Service history: A documented service by the manufacturer or a certified watchmaker increases the value.
- Scope of delivery: Box, papers and warranty card make a noticeable price difference on the Constellation Co-Axial Master Chronometer 29mm Lad.
- Independent certification: The CPS-52 standard covers 52 checkpoints — from the serial number and the timing machine to water resistance. The result is secured on the blockchain and can be verified at any time.
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