Omega Seamaster Planet Ocean 40mm Mens Watch
9 % 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.
What if you had bought back then …
What would a purchase at the median market price back then have become — at today's level of $7,839. A pure return calculation, excluding insurance, servicing and transaction costs.
Data from an aggregated median time series (watch_market_daily). CAGR = Compound Annual Growth Rate, normalized to 365 days. Not an investment recommendation.
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Technical data
Omega Ref. O21530402004001 — Variants and collector names
Known as: Planet Ocean 39.5, PO Midsize White, White Planet Ocean
Production phases and changes
- 2022: Summer Blue color variant 215.30.40.20.03.002 introduced as a new sister SKU; white .04.001 remains unchanged in the lineup
Movement variants
- 8800 (2016–today) · 25200 bph
Bezel variants
- PO600M-39.5-Weiß-Keramik-Liquidmetal-60min
Dial variants
- PO600M-39.5-Weiß-Keramik-Arabisch-Datum — Arabic numerals; date 3h; white ceramic dial; 39.5mm
Crystal variants
- Saphir-AR-beidseitig-PO600M-39.5mm
Bracelet variants
- Planet Ocean 39.5mm 3-Link Stahl (19mm Stegbreite) Ref. PO-39.5-3Link-Steel-2016
Reference 215.30.40.20.04.001 rarely shows up in forums under its full string of numbers. Collectors call it the Planet Ocean 39.5, PO Midsize White, or simply White Planet Ocean — three names for the same watch, all three circulating side by side in listings. The 39.5mm case sits deliberately between the 43.5mm men's version and the smaller ladies' models in the Planet Ocean line, landing on a size that suits wrists between 16 and 18cm.
## A white ceramic dial with one technical detail in the bezel
The dial is white ceramic, with Arabic numerals and a date window — a combination Omega rarely commits to this consistently. The bezel follows the same material: white ceramic with a 60-minute scale in Liquidmetal, a liquid-metal alloy Omega has used for over a decade to produce sharp, scratch-resistant scales instead of printed or inlaid markers.
## Caliber 8800, not 8900 — a difference that matters on resale
The reference is powered by the caliber 8800, not the larger 8900. For buyers, that means Master Chronometer certification is present, but the 8900's extended 60-hour power reserve is not. It's a detail that regularly gets overlooked when comparing prices across Planet Ocean calibers.
## 2022: a new sister SKU, no change to the original
In 2022, Omega expanded the color range with the Summer Blue, reference 215.30.40.20.03.002, featuring a gradient PVD ceramic dial and its own bezel color. The white .04.001 stayed untouched in the lineup — no dial update, no technical revision, just an added option alongside it.
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 Planet Ocean 40mm Mens Watch
Entry into Omega
At $7,839 this reference is one of the more affordable ways to wear a Omega on your wrist. That is precisely why many pieces have already passed through several hands — condition varies accordingly. Buyers here should pay particular attention to service history and honest photos from the seller.
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 Planet Ocean 40mm Mens 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 Seamaster Planet Ocean 40mm Mens 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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