Omega Constellation Manhattan Co-Axial 29mm Ladies Watch
25 % 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. O13125292055001 — Variants and collector names
Known as: Constellation Manhattan 29 Sedna Bicolor, Diamond MOP Manhattan
Movement variants
- 8700 (2018–today) · 25200 bph
Bezel variants
- Constellation-29-Manhattan-Diamond-SednaSteel-Fixed "Diamond Bezel Manhattan Sedna"
Dial variants
- White MOP Diamond Dial — OMEGA logo + CONSTELLATION + date at 6h; hour indices: diamonds in Sedna settings; hands + logo + star in 18K Sedna Gold
Crystal variants
- Saphir-Dom-AR-beidseitig-Constellation-Manhattan-29mm
Bracelet variants
- Constellation Manhattan Mono-Rang Bicolor Sedna Ref. Constellation-Manhattan-29-Monorang-SednaSteel-2018
Omega has consistently built the Constellation Manhattan 29 (Ref. O13125292055001) as a two-tone piece since the Sedna era, and it is precisely that material tension that makes this reference compelling. The 29 mm case pairs Omega's proprietary Sedna Gold alloy — an 18-karat rose gold blend incorporating palladium and copper — with polished steel components in the signature Manhattan profile. In collector circles the piece goes by two names: "Constellation Manhattan 29 Sedna Bicolor" and "Diamond MOP Manhattan." On the wrist, the colour transition reads more subtly than product photography suggests, which connoisseurs consider a point in its favour.
## Diamond Accents That Don't Shout
The white mother-of-pearl dial carries diamond hour markers, while the fixed Manhattan bezel in Sedna Gold adds a further row of brilliant-cut stones. Together the two elements account for several tenths of a carat distributed across bezel and indices. Wearing Ref. O13125292055001, you will notice the dial's mother-of-pearl depth shifts noticeably in natural light — an effect no product photograph fully captures. Measured directly against the Rolex Lady-Datejust 28 mm or the Cartier Baignoire, the Constellation delivers more stone weight per euro without raising its voice.
## Calibre 8700 and Why Prices Hold Their Ground
Ref. O13125292055001 is powered by Calibre 8700, Omega's proven quartz movement for this Constellation generation. Omega backs the line with an unrestricted 5-year manufacturer's warranty. On the pre-owned market, the two-tone variant holds its value more steadily than the all-steel version because the Sedna component places the piece unmistakably in a separate visual category. Well-kept examples with box and papers routinely achieve 80 to 90 percent of current retail.
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 Manhattan Co-Axial 29mm Ladies Watch
Market situation and price range
At $14,051 the Constellation Manhattan Co-Axial 29mm Ladies Watch 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.
Watch out for swings: This reference has an above-average volatility of 95.3 percent. In concrete terms: the price can move by several hundred euros within a few weeks. Check the current value before buying or selling — old listings or auction results from two months ago are of little help.
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 Manhattan Co-Axial 29mm Ladies Watch 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 Manhattan Co-Axial 29mm Ladies Watch.
- 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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