Omega Seamaster 300 Co-Axial Master Chronometer 41mm Bro
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. O23492412110001 — Variants and collector names
Known as: SM300 Bronze Gold, Seamaster 300 Bronze Gold
Movement variants
- 8912 (2021–today) · 25200 bph
Bezel variants
- SM300-2021-Braun-Keramik-60min
Dial variants
- SM300-2021-BronzeGold-Sandwich-vSLN — Sandwich construction: CuSn8 top plate (aged patina process) over SLN base plate; recessed hour indices; Arabic numerals at 6h + 9h; no date
Crystal variants
- Saphir-Dom-AR-beidseitig-SM300-41mm
Bracelet variants
- Braunes Kalbslederband 21 mm, Dornschließe 9K Bronze Gold Ref. SM300-BronzeGold-Braun-Kalbsleder-21mm-PinBuckle-9KBG
The Omega Seamaster 300 in Bronze Gold — reference O23492412110001 — is one of the less obvious picks in Omega's sports watch lineup, and that's precisely what makes it interesting. The proprietary 18-karat alloy material combines yellow gold with bronze, giving the case a warm, subtly muted character that steel variants simply cannot replicate structurally. Rotate the watch in direct light and it's immediately apparent: this is not ordinary rose gold.
## What the Sandwich Dial Has to Do with the 2021 Relaunch
The dial carries the internal code SM300-2021-BronzeGold-Sandwich-vSLN, describing a construction Omega introduced with the 2021 relaunch of the Seamaster 300 line. In a sandwich build, a second perforated plate sits above the actual dial base — the luminescent compound settles visibly in the cutouts rather than being simply printed on. Visually it recalls vintage references from the 1950s; technically it's more sophisticated than it first appears.
## Calibre 8912 and What METAS Actually Means
Calibre 8912 is METAS-certified, runs at 36,000 vibrations per hour, and achieves a rate accuracy of 0 to +5 seconds per day on the wrist. Magnetic resistance stands at over 15,000 gauss — relevant for anyone who doesn't treat the watch as a pure showpiece. Power reserve: 55 hours. The brown ceramic bezel with its 60-minute scale is scratch-resistant and holds its colour permanently, without the fading typical of tinted PVD coatings.
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 300 Co-Axial Master Chronometer 41mm Bro
Market situation and price range
At $15,752 the Seamaster 300 Co-Axial Master Chronometer 41mm Bro 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 300 Co-Axial Master Chronometer 41mm Bro 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 300 Co-Axial Master Chronometer 41mm Bro.
- 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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