Omega Constellation Manhattan Co-Axial 29mm
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. O13125292055002 — Variants and collector names
Known as: Constellation Manhattan 29 Steel-Gold MOP, Constellation 29 White Diamond Yellow Gold
Movement variants
- 8700 (2018–today) · 25200 bph
Bezel variants
- Constellation-29-Manhattan-Diamond-SteelYG-Fixed "Diamond-Paved Steel/YG"
Dial variants
- White MOP Diamond – YG Appliques — OMEGA logo + Constellation star + date at 6h, diamond hour markers, hands and appliqués in 18K yellow gold
Crystal variants
- Saphir-Dom-AR-beidseitig-Constellation-29
Bracelet variants
- Mono-Ring Stahl + 18K Gelbgold Ref. Constellation-Manhattan-29-Monorang-SteelYG-2018
The Omega Constellation Manhattan 29 in the steel and yellow gold two-tone with MOP dial is one of the few ladies' watches I genuinely enjoy seeing come in for purchase. 29mm case, a two-tone combination of steel and 18-karat yellow gold, paired with a white mother-of-pearl dial set with diamond indices in yellow gold — that's not a compromise, that's a deliberate choice. Omega has modernized the classic Manhattan design with real conviction, without sacrificing an ounce of its character.
## Calibre 8700 and What It Means for Market Value
The movement is the Calibre 8700 — a Co-Axial with central seconds and date, rated internally by Omega at ±8 seconds per day. In practice, I find these watches typically perform considerably better than that. For the market, this matters: a Constellation running a Co-Axial calibre holds its pre-owned value more consistently than models equipped with older, small-batch calibres lacking chronometer certification. The diamond-set bezel — two-tone and fixed — adds to the watch's visual identity, but it also pushes the entry price to around $5,144 in the current market.
## Who Buys Reference O13125292055002 and Why
This is not a speculation watch. Anyone searching for a well-maintained ladies' dress watch with an in-house movement that holds up in everyday wear and won't collapse in value over the long haul is in the right place here. Over the past twelve months I've seen several examples of this reference come through for purchase — trading in the $4,343 to $4,801 range for watches in good condition with box, no papers. With full documentation, the upper limit is around $5,258.
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
Market situation and price range
At $16,825 the Constellation Manhattan Co-Axial 29mm 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 Manhattan Co-Axial 29mm 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.
- 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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