Omega Seamaster Diver 300 M
8 % below RRP
📱 Track this reference's market value on the go with the watch value app — daily median, price alerts and a watchlist.
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 $4,420. 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.
🔔Set up a price alert
Be the first to know when the market value for Omega Ref. 212.30.41.20.01.003 reaches your target threshold. No ads, no newsletters — only the price alerts you set yourself. Cancel any time with a single click.
We send a confirmation email. The alert only becomes active after you click the link in that email (double opt-in). Our privacy notice applies. Multiple alerts per address are possible, max. 10 active at the same time. Not investment advice.
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. 212.30.41.20.01.003 — Variants and collector names
Known as: Ceramic Co-Axial 300M, Pre-Master SD300M 41, 212er, Ceramic Generation 300M
Production phases and changes
- 2009: Introduction of .003: ceramic bezel insert replaces the aluminum insert of the .002 reference
- 2012: Silent movement change: Cal. 2500C → Cal. 2500D (3-Level Co-Axial)
- 2018: Successor generation 210.30.42 (42mm, Cal. 8800, Master Chronometer) introduced; .003 phased out by 2019
Movement variants
- 2500C (2009–2012) · 25200 bph
- 2500D (?–today) · 25200 bph
Bezel variants
- SD300M-41-Keramik-Schwarz-wSLN-60min "Black Ceramic 300M Insert"
Dial variants
- Black Wave Dial 41mm — OMEGA / SEAMASTER / 300M·1000FT / Co-Axial / date 3h / applied baton indices with SLN / wave pattern (côtes de Genève horizontal)
Crystal variants
- Saphir-gewoelbt-AR-beidseitig-SD300M-42
Bracelet variants
- Seamaster Diver Ref. 1502
The decision in 2009 was almost imperceptible — when Omega moved from .002 to .003, it swapped the polished aluminum bezel insert for black ZrO2 ceramic. Hold the two side by side and it's immediately obvious: aluminum scratches, aluminum fades. Ceramic doesn't. That single material choice is why collectors refer to the 212.30.41.20.01.003 as the "ceramic-generation 300M." The black 60-minute insert has sat on the 41mm case without any color fade ever since — no matter how many years pass.
## The Silent Movement Update Nobody Noticed
Between 2011 and 2013, the caliber quietly transitioned from 2500C to 2500D. Omega never announced an exact cutoff date, and the change is invisible from the outside — identifiable only through serial number ranging or movement inspection. Both calibers drive the same black wave dial, and the Co-Axial escapement principle remained identical. The third lever of the 2500D simply improved long-term stability. Anyone buying the "Pre-Master SD300M 41" on the pre-owned market should ask specifically about the movement.
## Why the 212 Disappeared in 2019 — and What That Means Now
The 210.30.42 generation — with its new 42mm case and Cal. 8800 — replaced the entire 212 family in 2018. Remaining .003 stock filtered through dealers until around 2019. Today, the 212.30.41.20.01.003 is a clearly closed reference — no further variants, no new supply. That makes the market manageable: buyers who know what they want can find it, just not in unlimited quantities. Well-kept examples with box & papers have settled into their own pricing band since the successor launched in 2018.
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 $4,420 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 48.9 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 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.
Check the market value live now
Interactive price analysis with momentum indicator and buy/sell signal.
Go to the market value tool →