Omega Seamaster Diver 300 M
24 % 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 $5,799. 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. 210.32.42.20.03.002 — Variants and collector names
Known as: Summer Blue, SM75 Summer Blue Diver, SD300M Summer Blue, 75th Anniversary Summer Blue Rubber, Seamaster 75 Diver
Production phases and changes
- 2023: Introduction of 210.32.42.20.03.002 Summer Blue (Grand Feu enamel bezel + gradient dial + Poseidon caseback)
- 2018: Predecessor 210.32.42.20.03.001 introduced (standard blue, Cal. 8800, white enamel bezel, black rubber strap)
Movement variants
- 8800 (2023–today) · 25200 bph
Bezel variants
- SD300M-42-Keramik-Blau-SummerBlueGrandFeu-60min "Summer Blue Grand Feu Bezel"
Dial variants
- Summer Blue Gradient Wave Dial — OMEGA / SEAMASTER / Co-Axial Master Chronometer / 300M-1000FT, date at 6 o'clock
Crystal variants
- Saphir-gewoelbt-AR-beidseitig-SD300M-42
Bracelet variants
- Kautschuk Summer Blue Ref. SD300M-42-Rubber-SummerBlue-PinBuckle-2023
Omega introduced the 210.32.42.20.03.002 in 2023, as part of the 75th-anniversary Seamaster celebration spanning eleven new models across the collection. The reference runs alongside the 210.32.42.20.03.001, the standard blue with a white enamel bezel and black rubber strap dating back to 2018. The .002 carries a Grand Feu enamel bezel in blue, paired with a gradient wave-pattern dial — the rest of the build, Caliber 8800 with Co-Axial escapement, stays identical.
## Not a Limited Edition, But a Dial of Its Own
Despite the anniversary occasion, the 210.32.42.20.03.002 is not a limited edition. It remains a regular part of the Diver 300M line, with the Poseidon-and-seahorse caseback as a permanent feature rather than a special engraving. Anyone after the same look on a steel bracelet will find it under the sister reference 210.30.42.20.03.003. The rubber strap on the .32 line remains the real distinction between the two strap variants.
## Five Names Circulate for One Reference
Collectors call it Summer Blue, SM75 Summer Blue Diver, SD300M Summer Blue, 75th Anniversary Summer Blue Rubber, or simply Seamaster 75 Diver. Five names for one reference number is nothing unusual for anniversary models, but it complicates identification at purchase when only the collector nickname gets mentioned. To tell the .002 apart from the fourth-generation SD300M from 2018, watch for three things: the bezel color reflected in the dial's gradient, the wave pattern, and the Grand Feu texture of the bezel itself — the white enamel version stays with the original reference.
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 Diver 300 M
Entry into Omega
At $5,799 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 Diver 300 M 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 Diver 300 M.
- 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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