Omega New 2021 Speedmaster Moonwatch Professional Co-Axi
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. O31030425001001 — Variants and collector names
Known as: 3861 Hesalit, New Moonwatch 2021, Plexi Moon, Moonwatch Professional Cal. 3861 Stahl
Production phases and changes
- 2021: Market launch January 2021: first regular-production Moonwatch with Cal. 3861 Co-Axial Master Chronometer (replaces Cal. 1861 / Ref. 311.30.42.30.01.005)
- 2022: Bracelet update from late November 2021 (ongoing production): push-button Micro-Ajust folding clasp
Movement variants
- 3861 (2021–today) · 21600 bph
Bezel variants
- Moonwatch-3861-DON-Alu-Schwarz-Fixed "DON Bezel"
Dial variants
- Black Step Dial Hesalit – Printed Logo — OMEGA logo printed (not applied) / SWISS MADE / Co-Axial Master Chronometer Chronograph / three-step step dial / printed indices
Crystal variants
- Hesalit-Plano-Moonwatch-42mm
Bracelet variants
- Moonwatch 5-Bogen Stahl (komplett gebürstet, Original Clasp) Ref. SpeedyMoon-42-5Bogen-Stahl-Gebürstet-FoldoverClasp-2021
- Moonwatch 5-Bogen Stahl (komplett gebürstet, Push-Button Micro-Ajust Clasp) Ref. SpeedyMoon-42-5Bogen-Stahl-Gebürstet-MicroAjust-2022
Serial numbers
- 834000000 – ? (2021–?) — Omega has used randomized (non-sequential) 8-digit serial numbers since 2019; no linear inference of production date is possible. Cal. 3861 Moonwatches have been observed by collectors in the 834-million range. Alphanumeric serial numbers also run in parallel (announced since Nov. 2019).
The Omega Speedmaster Professional reference 311.30.42.30.01.001 replaced its predecessor 311.30.42.30.01.005 in January 2021 — and with it the Caliber 1861 after roughly 25 years. The new Co-Axial Master Chronometer Caliber 3861 brings a silicon hairspring, METAS certification, and magnetic field resistance up to 15,000 Gauss. None of that had ever been standard equipment in a regular Moonwatch before.
## What Sets the 3861 Apart on the Wrist
For the first time, a standard Moonwatch carries the hacking seconds function: the seconds hand stops when the crown is pulled, making precise time-setting possible. The silicon hairspring is impervious to the magnetic fields that could cause rate deviations in the 1861. The caseback remains engraved stainless steel with no sapphire display. The black step dial with printed logo and Hesalite crystal is the configuration collectors know as the "Plexi Moon" or "3861 Hesalit."
## The Micro-Ajust Clasp: Later Examples Preferred
In late November 2021, Omega quietly revised the folding clasp. The push-button Micro-Ajust version is 4 mm longer and allows fine adjustment of 2.3 mm. On the pre-owned market, that detail can make or break a buying decision: early pieces from the launch year still carry the original version, while upgrade kit Part# 117Z017553 makes retrofitting possible. Buyers who insist on factory completeness should check the serial number against the November 2021 production changeover.
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 New 2021 Speedmaster Moonwatch Professional Co-Axi
Entry into Omega
At $7,875 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 New 2021 Speedmaster Moonwatch Professional Co-Axi 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 New 2021 Speedmaster Moonwatch Professional Co-Axi.
- 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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