Omega Seamaster Diver 300M Co-Axial 44mm Mens Watch Grey
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. O21030445106001 — Variants and collector names
Production phases and changes
- 2024: Introduction of the 007 First Light special edition (Ref. 210.32.44.51.01.002) with a bicolor steel-Sedna bracelet as an addition to the base collection
Movement variants
- 9900 (2019–today) · 28800 bph
Bezel variants
- SD300M-44-Chrono-Keramik-Schwarz-Weiss-60min
- SD300M-44-Chrono-Keramik-Blau-WeissEmail-60min
Dial variants
- SD300M-44-Chrono-Schwarz-Keramik-Wellen-Rhodium — Laser-embossed waves, date at 6h, subdials rhodium-plated, ZrO2 ceramic pushers in black
- Blue Wave Chrono — SEAMASTER / DIVER 300M / laser-engraved wave surface / 12h counter@3h / small seconds+date@6h / 60min counter@9h / rhodium hands+appliques
- SD300M-44-Chrono-Grey-Keramik-Wellen-Rhodium — SEAMASTER / DIVER 300M / Co-Axial Master Chronometer — date at 6h, bicompax (subdials 3h + 9h)
Crystal variants
- Saphir-AR-beidseitig-SD300M-44-Chrono
Bracelet variants
- Rubber Strap Black (Steel Case) Ref. SD300M-44-Chrono-Rubber-Black-Steel-21mm
- 3-Link Stahl poliert/gebürstet Ref. SD300M-44-Chrono-3Link-Steel-PolishedBrushed-21mm
The Omega Seamaster Diver 300M Chronograph with reference 210.30.44.51.06.001 runs on the in-house Caliber 9900 — Co-Axial escapement, Master Chronometer certification, 44mm case. Anyone dealing with this reference in the trade quickly notices: the base stays fixed, while a whole family of variants builds up around it. Three dials, two bezels, and a special case from 2024. Plenty of material for a clean breakdown.
## Three Dials, One Wave Pattern
The wave pattern on the dial isn't a coincidence in this chronograph line — it's a consistent feature across all three variants. Black with rhodium-plated hands is the standard execution, and grey follows the same layout. The third variant carries its own name in the trade: Blue Wave Chrono, with a blue ceramic dial and the same wave engraving. That name is worth knowing when buying, since buyers often search for it directly and know it better than the plain reference number.
## Two Bezels, One Clear Difference
The bezels diverge more sharply than the dials. The black ceramic bezel with a white 60-minute scale is the straightforward standard version. The blue variant with an enamel scale, by contrast, is more involved to produce and turns up correspondingly less often on the pre-owned market. When assessing a specific watch, this difference is the first thing to check in the photos.
## The 2024 007 Special Case
In 2024, Omega released the 007 First Light special edition under Ref. 210.32.44.51.01.002, with a bicolor steel-Sedna bracelet nodding to the film franchise. None of this changed anything about the production of the base reference 210.30.44.51.06.001 — both lines run in parallel, with the special edition having no bearing on the design or availability of the standard versions.
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 300M Co-Axial 44mm Mens Watch Grey
Entry into Omega
At $9,861 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 300M Co-Axial 44mm Mens Watch Grey 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 300M Co-Axial 44mm Mens Watch Grey.
- 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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