Breitling Chronomat 42
13 % 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.
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 $8,987. 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.
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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.
Breitling Ref. AB0134101K1A1 — Variants and collector names
Known as: Copper Chronomat, Cognac Chronomat B01, Kupfer-Chronomat
Movement variants
- B01 (2020–today) · 28800 bph
Bezel variants
- AB0134-101-Uni60-Steel-RiderTab4 "Rider Tab Bezel"
- AB0134-721-Diamond-Uni60-RiderTab-Steel "Diamond Rider Tab Bezel"
Dial variants
- AB0134-101K1-Copper — 3 registers: 30min@3h, 12h@6h, small sec.@9h / date@6h / baton indices
Crystal variants
- Sapphire-Cambered-AR
Bracelet variants
- Rouleaux Stahlarmband 42mm Ref. AB0134-A1-Rouleaux-Steel-42
- Kautschukband Kupfer/Lachs mit Faltschließe Ref. AB0134-K1S1-CopperRubber
The Breitling Chronomat B01 42 in Ref. AB0134101K1A1 is the version the collector community has been seriously talking about since 2021. Not because of a new complication or a limited-edition frenzy — but because of the dial color. The Copper dial sits somewhere between rose gold and mocha, shifts through completely different tones depending on the light, and has given the Chronomat family something it had been missing for a while: character. In collector circles, the ref. goes by three names at once: Copper Chronomat, Cognac Chronomat B01, and Kupfer-Chronomat. That alone says something.
## What the B01 Caliber Delivers Beneath That Copper Dial
Under the dial ticks Breitling's in-house B01 movement — COSC-certified, with a 70-hour power reserve and a frequency of 28,800 vph. The COSC tolerance sits at -4/+6 seconds per day; Breitling ships B01 examples averaging +2/-1. The chronograph module is fully integrated, not a bolt-on construction. For an in-house manufacture chronograph in this class, that's genuinely solid execution — especially when you consider that the ref. currently trades on the secondary market somewhere between $5,029 and $5,944.
## Rider Tabs or Diamonds: Two Bezels, One Dial
AB0134101K1A1 comes with the classic Rider Tab bezel in steel — the Chronomat's defining feature since 1984, here as a one-piece 60-minute bezel. Those after something more exclusive will find a Diamond Rider Tab bezel variant within the 101K1 family, with set diamonds on the tabs. The 42 mm steel case is rated to 200 meters of water resistance. For the Copper dial, Breitling went with a sharp contrast pairing: copper-toned dial, white sub-dials, silver-toned indices — a combination that consistently photographs more understated than it reads on the wrist.
Brand profile: Breitling
Breitling is known for aviation and dive watches. Chronographs (Navitimer, Chronomat) are the most frequently counterfeited. Pay close attention to slide rule details and COSC certification.
- Wing logo: a genuine Breitling logo shows the anchor and wing tips that NEVER touch — precise negative space between them — fakes let the tips meet or overlap
- 3D 'B' crown: the 'B' on the crown must appear three-dimensional with a light reflection on the curve — a flat 'B' = fake
- Bezel scale vs. dial: the outer white bezel scale must align precisely with the inner black dial indices — fakes show misalignment
- Date disc depth: a genuine Navitimer date disc sits flush with the dial plane — fakes show the date window as a 'crater' (noticeably sunken or raised)
Serial number format: Breitling serial numbers: alphanumeric, located between the lugs at 6 o'clock. Format: one letter + 8 digits (e.g. 'AB012012'). Older models: digits only.
Further sources
Buying guide: Breitling Chronomat 42
Entry into Breitling
At $8,987 this reference is one of the more affordable ways to wear a Breitling 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.
Where the price stands
The price of the Chronomat 42 has risen by +23.7% over the past four months. Anyone selling now hits a good window. If you want to buy: no need to wait — the market is currently more hot than cold, and a clear end to the trend is not in sight.
Watch out for swings: This reference has an above-average volatility of 140.0 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 Breitling Chronomat 42 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 Chronomat 42.
- 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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