F.P. Journe Octa Automatique Lune
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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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Brand profile: F.P. Journe
Ultra-exclusive haute horlogerie manufacture, founded in 1999, price range $33,579-$559,650+. Extremely limited production numbers (under 1,000 pieces/year) make counterfeits rarer but highly profitable. Main fake vectors: Chronomètre Souverain, Tourbillon Souverain, Octa series.
- Movement plates MUST be made of 18K rose gold (since 2004) - test with a magnet, fakes use brass. Before 2004: rhodium-plated brass plates with specific perlage
- Remontoir d'Égalité mechanism on Chronomètre models: the 1-second jump of the seconds hand must be perfect; fakes show jerky motion or lack the mechanism entirely
- Dial guilloché: hand-engraved with absolutely even lines under 10x magnification, no CNC marks. Fakes show repeating patterns or printed texture
- 'Invenit et Fecit' signature on the movement: must show extremely sharp engraving with microscopic serifs; fakes are blurry or laser-etched
Serial number format: Sequential 3-4 digit number + hyphen + model abbreviation (2-4 letters). Engraving must be extremely precise with even depth. Serial number also appears on the inside of the case and on the warranty card. Caution: Very low numbers (<100) are extremely rare and highly valuable.
Further sources
Buying guide: F.P. Journe Octa Automatique Lune
What matters at this price point
At $236,933 we are no longer talking about an everyday watch but a collector's piece. Every detail drives the price: an original dial can be worth five figures more than a service dial, missing papers noticeably depress the value, and an over-polished bezel is effectively lost money. Anyone buying in this range should take their time and, when in doubt, take a second look.
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 F.P. Journe Octa Automatique Lune 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 Octa Automatique Lune.
- 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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