Audemars Piguet Royal Oak Offshore Chronograph
+5 % above 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
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.
Audemars Piguet Ref. 26400IO.OO.A004CA.01 — Variants and collector names
Known as: Ti-Ceramic Offshore, Titanium Ceramic ROO 44, Slate Offshore, Slate ROO
Production phases and changes
- 2017: Introduction of 26400IO.OO.A004CA.01: titanium case + black ceramic bezel + Slate Grey Méga Tapisserie dial (SIHH 2017)
- 2020: Introduction of sibling reference 26400IO.OO.A004CA.02: grey ceramic bezel + Grey Méga Tapisserie dial with blue accents and blue inner ring
Crystal variants
- Double Glareproofed Sapphire
Reference 26400IO.OO.A004CA.01 debuted at SIHH in January 2017, bringing something the Royal Oak Offshore Chronograph line hadn't seen before: a full titanium case paired with a black ceramic bezel and a Slate Grey Méga Tapisserie dial. 44 millimeters across, with a launch price of around $30,400. Collectors quickly settled on the nickname Ti-Ceramic Offshore, sometimes Titanium Ceramic ROO 44 — both nail exactly the material combination this watch is built from.
## In 2020, the .01 Got Company
Three years after launch, Audemars Piguet followed up with reference 26400IO.OO.A004CA.02: same foundation, but a grey ceramic bezel instead of black, plus a grey dial with blue accents and a blue inner ring. The .01 stayed in the lineup alongside it, and both references still run in parallel today. That's led to some mix-ups on forums. Anyone searching for Slate Offshore or Slate ROO is almost always after the .01, with its pure grey-on-black look — not the blue-accented .02.
## How to Tell the .01 Apart, If You're Unsure
The fastest wrist check: black ceramic bezel plus an all-grey dial with no hint of blue. The .02 gives itself away instantly through the blue inner ring by the crown and the blue indexes. For titanium purists in the ROO family, the .01 is the more uncompromising of the two — a 2017 build with no steel in the case, just ceramic on the bezel that still shrugs off scratches years later.
Brand profile: Audemars Piguet
AP Royal Oak is one of the most coveted and most counterfeited luxury watches. The distinctive octagonal bezel with 8 screws and the tapisserie dial are the central inspection points.
- Date disc: genuine caliber 3120/5120 flips the date INSTANTLY at midnight (a snapping jump) — clones creep from 23:00 to 01:00
- Thickness: Royal Oak Jumbo 15202 is exactly 8.1 mm thick — clones measure 8.4–8.8 mm (movement sits too tall) — calipers reveal it immediately
- Tapisserie dial: under 10× magnification the pyramid edges must be sharp and geometrically precise — fakes show soft, pressed, or laser-etched surfaces
- Bezel screws: 8 hexagonal screws with mirror polishing and exact alignment — fakes: flatter, duller, asymmetric
Serial number format: AP serial numbers: 6–7-digit number engraved between the lugs at 9 o'clock. Reference number engraved separately on the opposite side. Very small — barely legible without a loupe.
Further sources
Buying guide: Audemars Piguet Royal Oak Offshore Chronograph
What drives the price here
At $44,304 the watch sells well if the condition is right. A market rule of thumb: a complete set with box, papers and warranty card brings 10 to 15 percent more than the bare watch. Buying without papers can pay off, but you take the same discount again later when you resell.
Watch out for swings: This reference has an above-average volatility of 103.6 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 Audemars Piguet Royal Oak Offshore Chronograph 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 Royal Oak Offshore Chronograph.
- 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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