Blancpain Fifty Fathoms Bathyscaphe Quantième Complet Phases
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
Brand profile: Blancpain
Blancpain is a Swiss luxury watch manufacturer in the upper price segment (8,000–500,000+ EUR), known for the Fifty Fathoms dive watches and classic complications. Primary counterfeiting targets are the Fifty Fathoms, Villeret, and Léman models. The brand is counterfeited less frequently than Rolex/Omega, but Super Clones of the Fifty Fathoms have increased significantly in recent years.
- Movement finish: Originals use manufacture movements (Cal. 1150, 1315, 1335, 6654) with specific Côtes de Genève, blued screws, and a gold rotor with Blancpain engraving. Fakes typically use ETA/Miyota with printed decorations and poor finish quality.
- Lume: Blancpain uses a special LumiNova in warm beige/cream tones on vintage-inspired models. Fakes often have lume that is too white, too greenish, or unevenly applied with unclean edges.
- Date disc: The original has a specific typeface with a characteristic '4' and '9', perfectly centered in the window with anti-reflective coating on both sides. Fakes often show missing AR coating, the wrong typeface, or alignment errors.
- Crown details: Original crowns feature a finely engraved 'JB' logo (Jehan-Jacques Blancpain) with precise lines and specific knurling. Fake crowns show blurred engravings, incorrect proportions, or overly smooth surfaces.
Serial number format: From the 2000s onward, Blancpain uses a format of 4 digits, hyphen, 4 digits (e.g. 0856-1234). Serial numbers are engraved both on the case (between the lugs at 6 o'clock) and on the movement. Newer models (from ~2010) may feature longer alphanumeric serial numbers. The engraving is precise with uniform depth and sharp edges — never etched or laser-engraved with discoloration. Fakes often show engravings that are too shallow or use the wrong typeface.
Further sources
Buying guide: Blancpain Fifty Fathoms Bathyscaphe Quantième Complet Phases
Market situation and price range
At $20,405 the Fifty Fathoms Bathyscaphe Quantième Complet Phases 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 Blancpain Fifty Fathoms Bathyscaphe Quantième Complet Phases 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 Fifty Fathoms Bathyscaphe Quantième Complet Phases.
- 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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