Omega Constellation Co-Axial Master Chronometer 29mm Lad
10 % below RRP
📱 Track this reference's market value on the go with the watch value app — daily median, price alerts and a watchlist.
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.
🔔Set up a price alert
Be the first to know when the market value for Omega Ref. O13128292099003 reaches your target threshold. No ads, no newsletters — only the price alerts you set yourself. Cancel any time with a single click.
We send a confirmation email. The alert only becomes active after you click the link in that email (double opt-in). Our privacy notice applies. Multiple alerts per address are possible, max. 10 active at the same time. Not investment advice.
Technical data
Omega Ref. O13128292099003 — Variants and collector names
Known as: Blue Aventurine Constellation, Aventurine 29 Sedna, Night Sky Dial Constellation
Movement variants
- 8700 (2020–today) · 25200 bph
Bezel variants
- Constellation-29-Diamond-SednaGold-Fixed "Diamond Bezel Sedna"
Dial variants
- Blue Aventurine Manhattan — Date at 6H; Omega logo + Constellation star 18K Sedna; 11 diamond hour markers; no printed numerals
Crystal variants
- Saphir-Dom-AR-beidseitig-Constellation-29
Bracelet variants
- Alligatorleder Blau – Sedna/Stahl Dornschließe Ref. Constellation-29-SednaSteel-BlueAlligator-PinBuckle
Omega has taken the Constellation 29 with reference O13128292099003 to a level that is rare in the 29-millimeter class. The Blue Aventurine dial — listed in-house as "Blue Aventurine Manhattan" — delivers that deep night-sky effect that genuine aventurine glass uniquely produces: not a printed background, but mineral quartz with embedded iron oxide particles that shimmer differently depending on the angle of light. Collectors also know this variant as the "Night Sky Dial Constellation" or "Aventurine 29 Sedna" — three names, one reference.
## 86,400 Seconds Under METAS Control
Powered by the calibre 8700, a Co-Axial movement with METAS Master Chronometer certification, maximum rate deviation is held to 15 seconds per day — measured in magnetic fields up to 15,000 Gauss. Conventional chronometer certifications don't come anywhere near testing at those magnetic field levels. For a 29 mm watch, that is precision engineering, not a marketing promise.
## Sedna Gold and the Physics of the Fixed Bezel
The diamond bezel is set in Sedna Gold, Omega's proprietary rose-gold alloy with a palladium content — introduced in 2013 to permanently slow the fading of the rosé tone. Bracelet and case follow the same material, a coherence that registers on the pre-owned market. Current dealer prices for the O13128292099003 range between $8,573 and $10,516 and the price curve has held steady over the past 18 months.
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.
Check the market value live now
Interactive price analysis with momentum indicator and buy/sell signal.
Go to the market value tool →