Omega Seamaster Aqua Terra Co-Axial Master Chronometer 3
11 % 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. O22020382003001 — Variants and collector names
Known as: Aqua Terra Bicolor 38, AT 38 Sedna
Production phases and changes
- 2022: Expansion of the 220.20 family with the Aqua Terra Shades collection (Ref. 220.20.38.20.02.002) featuring Moonshine™ Gold elements instead of Sedna™ Gold
Movement variants
- 8800 (2017–today) · 25200 bph
Bezel variants
- AT38-Fixed-SednaGold-Polished
Dial variants
- AT38-Blau-Teak-SednaGold-03 — OMEGA / Seamaster / horizontal Teak pattern / Date 6h / Sedna Gold baton indices and numerals
- Aqua Terra Shades Moonshine — OMEGA / Seamaster Aqua Terra Shades / horizontal Teak pattern / Date 6h / Moonshine™ Gold indices
- AT38-Silber-Teak-SednaGold-02 — OMEGA / Seamaster / horizontal Teak pattern / Date 6h / Sedna Gold baton indices
Crystal variants
- Saphir-AR-beidseitig-AT38
Bracelet variants
- Seamaster Diver 300M Stahl / Sedna Gold Armband Ref. SD300M-42-3Link-StahlSedna-2018
- Aqua Terra 38 Integriert Bicolor Stahl/Sedna Ref. AT38-3Link-Steel-SednaGold-Integrated-19mm
Reference 220.20.38.20.03.001 belongs to the Aqua Terra Bicolor 38 family and is often known among collectors as the AT 38 Sedna, named for its fixed, polished bezel in Sedna™ Gold, Omega's proprietary 18-karat red gold alloy. The dial features the brand's signature teak pattern in blue, paired with Sedna gold accents on the bezel and hands. Powering the 38mm watch is the Caliber 8800, a Co-Axial Master Chronometer movement with roughly 55 hours of power reserve.
## The 2022 Shades Expansion
In 2022, Omega expanded the 220.20 family with the Aqua Terra Shades collection. Reference 220.20.38.20.02.002 introduced a silver teak dial variant in Moonshine™ Gold rather than Sedna™ Gold, identifiable by the "Aqua Terra Shades" designation on the dial and in official product materials. The case and caliber remained unchanged from the existing Sedna line. Importantly, the 03.001 reference with its blue dial stayed in the lineup throughout — the Shades launch didn't replace it.
## How to Spot the Sedna Variant
When examining one of these watches, the bezel is the key detail. Fixed, polished, and cast in Sedna gold rather than the lighter Moonshine alloy, the difference is immediately apparent next to the Shades reference 220.20.38.20.02.002. The blue teak dial further sets the 03.001 apart from the silver Sedna model, 220.20.38.20.02.002. Anyone buying an AT 38 Sedna should check both of these reference points rather than relying on dial photos alone.
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 Seamaster Aqua Terra Co-Axial Master Chronometer 3
Market situation and price range
At $14,131 the Seamaster Aqua Terra Co-Axial Master Chronometer 3 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 Seamaster Aqua Terra Co-Axial Master Chronometer 3 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 Seamaster Aqua Terra Co-Axial Master Chronometer 3.
- 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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