Omega Seamaster Diver 300M 42mm Mens Watch Black
10 % 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. O21090422001003 — Variants and collector names
Known as: Bronze Gold Burgundy, Bronze Burgundy Diver
Production phases and changes
- 2021: Ref. 210.90.42.20.01.001 NTTD 007 Edition: titanium case with bronze gold accents; black dial, black aluminum bezel — first use of the bronze gold alloy in the SD300M segment
- 2024: Ref. 210.90.42.20.10.001: titanium/bronze gold, green dial + green aluminum bezel — second iteration of the bronze gold concept, still not a full bronze gold case
- 2025: Ref. 210.90.42.20.01.003: first fully 9K bronze gold case (case + mesh bracelet in the same alloy); burgundy bezel as a new color concept; black no-date dial
Movement variants
- 8806 (2025–today) · 25200 bph
Bezel variants
- SD300M-42-BronzeGold-Burgund-Alu-vSLN-60min "Burgundy Insert"
Dial variants
- Black/Bronze Dial NoDate — Sandblasted black aluminium; PVD 18K bronze gold hands + blackened hour indices with Vintage Super-LumiNova; no date
Crystal variants
- Saphir-gewoelbt-AR-beidseitig-SD300M-42
Bracelet variants
- Bronze Gold Milanese Mesh Ref. SD300M-42-Mesh-BronzeGold-2025
- Schwarz Kautschuk integriert mit Bronze-Gold-Dornschließe Ref. SD300M-42-Rubber-Black-BronzeGoldBuckle-2025
Ref. 210.90.42.20.01.003 is the third generation of a concept that began in 2021 with the NTTD-007 Edition. Back then, Ref. 210.90.42.20.01.001 kept the bronze gold idea confined to a titanium case with bronze gold accents – no date window, powered by the Caliber 8806, tied to the Bond film No Time to Die. 2024 brought the second stage: Ref. 210.90.42.20.10.001 introduced a green dial and a green aluminum bezel, while the mesh bracelet stayed titanium with bronze gold accents. Only in 2025, with the reference discussed here, does the nod become a full-blown statement. For the first time, case and mesh bracelet are made entirely from the same alloy.
## 9 Karat, 37.5 Percent Gold, No Nickel
The 9K Bronze Gold used here is made up of 37.5 percent gold, along with palladium and silver. Nickel and iron are absent entirely, which makes the alloy hypoallergenic and noticeably boosts its magnetic resistance. For a dive tool built around the Caliber 8806, that's not a marketing footnote – it's a real property rarely found on solid-metal cases.
## Burgundy on Black Instead of Green
The dial is black, sandblasted, and date-free – the bezel carries a burgundy insert for the first time, with a vintage-look aluminum scale spanning 60 minutes. After bronze titanium in 2021 and green in 2024, burgundy is the collection's third color statement, this time paired with bronze gold accents on the dial itself.
## $27,900 for the Mesh Version
The mesh version runs $27,900, while the rubber variant (Ref. 210.92.42.20.01.003) comes in at $13,900. The gap between the two prices is nearly the value of a second SD300M in steel – a sign of just how heavily Omega prices the material itself.
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 42mm Mens Watch Black
Market situation and price range
At $33,969 the Seamaster Diver 300M 42mm Mens Watch Black sits in a segment where first owners sell regularly — clean pieces with box and papers are not uncommon. The jump from "good" to "very good" usually costs 1,000 to 2,000 euros more at purchase. You get that premium back on resale if the condition is preserved.
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 42mm Mens Watch Black 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 42mm Mens Watch Black.
- 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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