Omega Seamaster 300
12 % 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 $5,013. 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
Lift angle 52° — important for timing-machine diagnosis: with this value a watchmaker can correctly measure rate deviation, amplitude and beat error. ChronoCheck verifies such technical details directly from the manufacturers' factory specifications.
Omega Ref. 233.30.41.21.01.001 — Variants and collector names
Known as: SM300 Master, SM300 2014, Seamaster 300 Heritage, SM300 First Generation
Production phases and changes
- 2014: Introduction of the Seamaster 300 Master Co-Axial (Ref. 233.30.41.21.01.001) at Baselworld 2014
- 2015: SPECTRE Limited Edition (Ref. 233.32.41.21.01.001) introduced as a parallel reference (7,007 pieces)
- 2021: 233.30 generation succeeded by the new SM300 line (Ref. 234.30.41.21.01.001) with Cal. 8806
Movement variants
- 8400 (2014–2020) · 25200 bph
Crystal variants
- Saphir-Dom-AR-beidseitig-SM300-41mm
Serial numbers
- 93000000 – 96999999 (2014–2014) — Omega serial number reference range approx. 2013–2014 (±1–2 years, not model-specific)
- 97000000 – 99999999 (2015–2018) — Omega serial number reference range approx. 2015–2018 (±1–2 years, not model-specific)
Omega unveils the Seamaster 300 Master Co-Axial (Ref. 233.30.41.21.01.001) at Baselworld 2014 as a modern reissue of the original 1957 model. Under the dial, the Cal. 8400 delivers 15,000 gauss of antimagnetic resistance. It's paired with a black ceramic bezel with a Liquidmetal scale and a transparent sapphire caseback. Collectors know the reference by several names — SM300 Master, SM300 2014, Seamaster 300 Heritage, and SM300 first-generation all turn up interchangeably in forums and auction catalogs.
## The Spectre Variant: Related, But Its Own Reference
2015 brings the SPECTRE Limited Edition (Ref. 233.32.41.21.01.001), a parallel reference tied to the James Bond film. 7,007 pieces are made, identifiable by the lollipop seconds hand, a special caseback engraving, and a slightly different dial finish. Important for valuation: this is not a variant of the 233.30, but a distinct reference number entirely. Confuse the two when buying, and you'll misjudge the price fast.
## 2021 Marks the End of the 233.30 Era
Seven years after its debut, Omega retires the line. The new generation runs the Cal. 8806, drops the display caseback, and gets a reworked bracelet construction along with an updated dial layout under reference 234.30.41.21.01.001. The 233.30 has been discontinued ever since. For the pre-owned market, that means: any example with the Cal. 8400 and a sapphire caseback comes from the first generation, produced between 2014 and 2021 — a seven-year production run that clearly sets the reference apart from its successor today.
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 300
Entry into Omega
At $5,013 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.
Watch out for swings: This reference has an above-average volatility of 24.1 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 Seamaster 300 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 300.
- 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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