Omega Seamaster Diver 300 Co-Axial 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.
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Technical data
Omega Ref. O21032422001001 — Variants and collector names
Known as: Bond Black, New SMP Black Rubber
Production phases and changes
- 2018: Generation change: 212.xx predecessor (Cal. 2500, 41 mm, no Master Chronometer) replaced by the 210.xx generation (Cal. 8800 METAS, 42 mm, sapphire caseback, new rubber strap with deployant clasp, conical helium escape valve)
Movement variants
- 8800 (2018–today) · 25200 bph
Bezel variants
- SD300M-42-Keramik-Schwarz-WeissEmail-60min
Dial variants
- Wave Dial Black Steel — SEAMASTER / 300M / date at 6h / ceramic wave pattern laser-engraved / rhodium baton indices
Crystal variants
- Saphir-gewoelbt-AR-beidseitig-SD300M-42
Bracelet variants
- Kautschuk-Band Schwarz (Ref. 210.30.42.20.01.010) Ref. SD300M-42-Rubber-Schwarz-2018
In March 2018, Omega unveils the second generation of the Seamaster Diver 300M at Baselworld, and with it, the old reference system falls away. 212.30/212.32 becomes 210.30/210.32 — the 210.32 rides on rubber, the 210.30 on steel. The O21032422001001 belongs to the rubber line, known among collectors as the "New SMP Black Rubber," with some simply calling it the "Bond Black."
## From Cal. 2500 to Cal. 8800 — 1mm More Case
Its predecessor ran the Cal. 2500 in a 41mm case, with no Master Chronometer certification. The 210 generation brings the Cal. 8800 with METAS certification, a sapphire caseback replaces the solid steel one, and the case grows to 42mm. It also gets a new rubber strap with a fold-over clasp and a conical helium escape valve in place of the old screw-in type.
## The Wave Dial Stays, the Bezel Gets Sharper
Omega carries the black ceramic dial with its signature wave pattern over largely unchanged, kept entirely in steel with a date window. What's new is the sharper contrast on the bezel: black ceramic with a white enamel 60-minute scale, a detail that's immediately obvious when you set it side by side with the 212 generation. For collectors, 2018 isn't a facelift — it's a genuine generational shift, with caliber, certification, case size, and strap technology all changing at once.
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 Co-Axial Mens Watch
Entry into Omega
At $6,453 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 Co-Axial 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 Diver 300 Co-Axial 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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