Cartier Ballon Bleu
11 % 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
Cartier Ref. WSBB0071 — Variants and collector names
Known as: Ballon Bleu Green 40, BB40 Green, Green Balloon
Production phases and changes
- 2022: Introduction of tool-free interchangeable strap system on the Ballon Bleu 40mm; steel bracelet AND alligator leather strap both included
Movement variants
- 1847 MC (?–today) · 28800 bph
Bezel variants
- WSBB0071-Bezel-Steel-Smooth
Dial variants
- Green Sunray — Roman numerals, date window at 3 o'clock, Cartier signature at 7 o'clock, sword hands silver
Crystal variants
- Saphirglas-BallonBleu-40
Bracelet variants
- Ballon Bleu 40mm Alligator-Lederband (interchangeable, im Lieferumfang) Ref. BallonBleu-40-Alligator-QuickSwitch
- Ballon Bleu 40mm Edelstahl-Armband (interchangeable) Ref. BallonBleu-40-Steel-QuickSwitch
Reference WSBB0071 goes by several names among Cartier collectors. Ballon Bleu Green 40 and BB40 Green are the most common, and every so often forums shorten it to just Green Balloon. All three point to the same 40mm version with a dark green sunray dial (tracked internally as WSBB0071-Dial-DarkGreen-Sunray), set in a smooth steel bezel that never picked up a nickname of its own. Power comes from the caliber 1847 MC.
## 2022: two straps in one box
The real turning point in this model's story came in 2022. Cartier brought its QuickSwitch strap system, established on the Santos since 2018, over to the Ballon Bleu 40mm. From that point on, the steel bracelet and alligator leather strap could be swapped without tools, and both came included straight from the factory. Before that, buyers had to commit to one strap at purchase, often paying extra for the second option. The list price at launch was around 5,250 euros, including both straps.
## What this means for the market value of the WSBB0071
Buy a WSBB0071 from before 2022, and you'll typically get just one strap with it. That's not a minor detail — it's a factor that actually moves the valuation: examples with both straps trade noticeably closer to the original list price of 5,250 euros on the secondary market, since the accessory value gets sold right along with the watch. Worth checking the fine print of the listing before you buy, then. One strap or two — that's what decides the real value of the configuration.
Brand profile: Cartier
Cartier watches (Santos, Tank, Ballon Bleu) are popular targets for counterfeiters. The distinctive design (Roman numerals, blue sword hands) is recognizable — but also easy to copy.
- Sapphire cabochon crown: on genuine pieces it's SET INTO THE METAL (bezel-set); on fakes it's usually GLUED. Test: loupe — adhesive residue around the edge = fake.
- Bracelet screws: genuine Cartier bracelets ALWAYS have visible screw slots. Pins instead = fake.
- 'Swiss Made' at 6 o'clock: MICROPRINTED directly beneath the 6 o'clock marker. Fakes often omit it or print it crooked.
- Guilloché pattern: under 10x magnification, EXACTLY parallel and uniformly deep. Irregularities = fake.
Serial number format: Cartier serial numbers: alphanumeric, on the case back. Older models: number located between the crystal ring and the case. New purchases come with a Cartier passport.
Further sources
Buying guide: Cartier Ballon Bleu
Entry into Cartier
At $8,509 this reference is one of the more affordable ways to wear a Cartier 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 Cartier Ballon Bleu 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 Ballon Bleu.
- 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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