Omega Seamaster Diver 300M Automatic 42mm Mens Watch Ros
10 % 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 $34,981. 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. O21052422004001 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
Omega Ref. O21052422004001 — Variants and collector names
Movement variants
- 8801 (2025–today) · 25200 bph
Bezel variants
- SD300M-42-SednaGold-60min-PositiveRelief
Dial variants
- SD300M-42-Weiss-Keramik-Wellen-Sedna-Date — SEAMASTER / DIVER 300M / date 6h – white matte ceramic dial, polished waves in positive relief (laser-cut), 18K Sedna Gold skeleton hands and indices
Crystal variants
- Saphir-gewoelbt-AR-beidseitig-SD300M-42
Bracelet variants
- Kautschuk braun texturiert – Sedna-Gold-Dornschließe Ref. SD300M-42-Rubber-Brown-SednaGold-PinBuckle-2025
Reference 210.62.42.20.04.001 brings together something Omega rarely combines: a 42mm case in 18-karat Sedna gold and a white ceramic dial with the Diver 300M's signature wave pattern. Since the Sedna alloy debuted in 2016, this gold variant of the Diver line has stayed a niche play against the steel versions that make up the bulk of production.
## The Dial Does the Real Talking
White on Sedna gold is unusually restrained for a full-gold watch. The wave pattern radiates across the dial, and the date window sits at 3 o'clock in the Diver's familiar spot. Collectors who normally steer clear of gold sports watches tend to warm to this one — the color combination reads less flashy than the champagne or black dial variants of the same reference.
## A Relief Bezel, Not a Printed One
The Sedna gold bezel carries its 60-minute scale in positive relief — milled proud of the surface rather than printed on. That's a more demanding manufacturing process than the ceramic bezels on the steel models, and it accounts for part of the price gap versus the 210.30 line.
## Caliber 8801 as the Value Anchor
Inside the case runs the Caliber 8801, a Co-Axial Master Chronometer with 55 hours of power reserve and certification to 15,000 gauss. This caliber has powered the gold Diver models since 2015 and is considered one of the most robust automatic movements currently in Omega's Seamaster lineup. For valuation purposes, condition matters as much as the material mix — the gold bezel especially, since relief edges lose their sharpness quickly under careless polishing.
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 Automatic 42mm Mens Watch Ros
What drives the price here
At $34,981 the watch sells well if the condition is right. A market rule of thumb: a complete set with box, papers and warranty card brings 10 to 15 percent more than the bare watch. Buying without papers can pay off, but you take the same discount again later when you resell.
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 Automatic 42mm Mens Watch Ros 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 Automatic 42mm Mens Watch Ros.
- 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 →