Breitling Classic AVI Chronograph 42 Mosquito Leather Strap
26 % 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 $5,121. 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
Breitling Ref. Y233801A1B1X1 — Variants and collector names
Known as: Mosquito, AVI Mosquito 42, Reverse Panda Mosquito, DH.98 Tribute, Red Hand Mosquito
Movement variants
- B23 (2023–today) · 28800 bph
Bezel variants
- Y233801-Bidi-Ceramic-Black-12H "Black Ceramic BiDi 12H"
Dial variants
- Mosquito Black Reverse Panda
Crystal variants
- Sapphire-Cambered-AR
Bracelet variants
- 5-Reihen Pilot Stahlarmband Ref. A233801-A1-PilotSteel-5Row
- Braun Top-Stitched Kalbsleder Strap (Mosquito) Ref. Y233801-X1-BrownCalfskin
Serial numbers
- ? – ? (2023–?) — Breitling engraves the serial number on the case back (between the lugs at 6 o'clock). Breitling does not publish year-based serial number ranges for current production; no third-party sources with verified ranges are available for Y233801.
Y233801A1B1X1 circulates among collectors under at least five different names: Mosquito, AVI Mosquito 42, Reverse Panda Mosquito, DH.98 Tribute, Red Hand Mosquito. The 42mm case makes this reference a direct tribute to the de Havilland Mosquito, the British plywood fighter-bomber of which more than 7,781 were built between 1940 and 1950. Search "Red Hand Mosquito" online without knowing the reference number and you'll often land on mismatched listings — which is exactly why I always ask for the exact reference first when someone contacts me about this model.
## The Dial Behind the Nickname
The reverse panda effect lives in the dial code Y233801-B1-Black-ReversePanda-Arabic: black dial base, cream-white Arabic numerals, three light-colored subdials. Classic panda dials flip that arrangement — here it runs the other way round, which is where collectors got the name. When I check authenticity, the first thing I look at is the contrast between the numeral color and the subdial rings, since replicas almost always fall short on that gradation.
## The Ceramic Bezel Is the First Checkpoint
The bidirectional 12-hour bezel (code Y233801-Bidi-Ceramic-Black-12H) is made of black ceramic rather than coated steel. A light tap against glass gives it away almost instantly — ceramic rings brighter and harder. Power comes from the Caliber B23, Breitling's chronometer-grade base movement for the AVI-1953-Re-Edition line. For buyers, the combination of reference number, dial code, and bezel code remains the most reliable way to verify a listing before you buy.
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 Classic AVI Chronograph 42 Mosquito Leather Strap
Entry into Breitling
At $5,121 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
Barely any movement over the past four months (+0.0%). The market for this reference is calm, with no pressure in either direction. Good for buyers who want to compare at their leisure.
Watch out for swings: This reference has an above-average volatility of 24.3 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 Classic AVI Chronograph 42 Mosquito Leather Strap 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 Classic AVI Chronograph 42 Mosquito Leather Strap.
- 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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