IWC Aquatimer Chronograph
18 % 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 $6,210. 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
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.
IWC Ref. IW376803 — Variants and collector names
Known as: Aqua Chrono, Aquatimer Chrono, SafeDive Chrono
Movement variants
- 79320 (2014–today) · 28800 bph
Bezel variants
- IW376803-Bezel-SafeDive-SS "SafeDive"
Dial variants
- IW376803-Dial-Black — Black dial; applied steel baton indices with white luminous material; day/date window at 3 o'clock; chronograph sub-dials: 30-min counter@12, 12-hr counter@6, running seconds@9
Crystal variants
- IW376803-Saphir-AR-Konvex-Beidseitig
Bracelet variants
- Kautschukband Schwarz mit Quick-Change Ref. IW376803-Rubber-Black-QuickChange
The IWC Aquatimer Chronograph Reference IW376803 is one of the few complication dive watches that genuinely moves in the market. Collectors know it by three names: Aqua Chrono, SafeDive Chrono, or simply Aquatimer Chrono — which explains the healthy market depth: buyers find their way to this watch from multiple directions. The case measures 44 millimeters, is water-resistant to 300 meters, and features the SafeDive system — an inner rotating bezel that can be operated from outside the case without compromising the pressure seal.
## The Heart: Caliber 79320
The movement is IWC caliber 79320, a chronograph with column-wheel control. Power reserve stands at 46 hours — modest, but practical for an active chronograph. On the secondary market, examples of the IW376803 regularly surface between 4,500 and 6,200 euros, depending on condition and paperwork. The spread of roughly 27 percent makes one thing clear: buyers reward complete sets noticeably, and that premium carries even more weight for dive watches with their original rubber strap.
## Why This Reference Deserves a Second Look
IWC fundamentally redesigned the Aquatimer line in 2014; the IW376803 belongs to the generation before that. For collectors who appreciate the older design language, it is the natural choice. Well-preserved examples on the market turn in under 30 days — a liquidity figure that few complication watches in this price segment can match. Whoever buys the IW376803 isn't getting a shelf trophy. They're getting a watch that belongs near water.
Brand profile: IWC
IWC Schaffhausen produces high-quality pilot and sports watches. The Portugieser, Pilot's Watch (Big Pilot + Mark XVIII/XX), and Portofino are the most frequently faked references. Since 2025, APS Factory V3 has produced integrated 52010 super-clones with correct case thickness — classic tells (case thickness, movement visibility) are only partially reliable against these. Key checks today: engraving depth, seconds tick interval, thermally blued hand color, and sub-dial proportions.
- Serial number: genuine IWC serials are 6 digits, purely numeric, on the caseback — all serial numbers are verifiable in the IWC 'My IWC' portal. Fakes often have 7 digits or a mix of letters and numbers.
- Portugieser sub-dial seconds intervals: a GENUINE piece has exactly 3 mini-ticks between each seconds index (high beat rate of 28,800 vph) — fakes have 4 or irregular ticks (lower beat rate).
- Caseback engraving 'International Watch Company': genuine engraving is DEEP (perceptible with a fingernail) and sharp-edged — fakes are shallower, sometimes just laser-printed rather than truly engraved. Test: raking light and a loupe.
- Portugieser/Portofino blue hand color: thermally blued steel shifts from deep blue to light violet depending on viewing angle — painted fake hands show a flat, uniform blue.
Serial number format: IWC serial numbers: 6-digit numeric on the caseback. Verifiable online via the IWC My IWC Portal.
Further sources
Buying guide: IWC Aquatimer Chronograph
Entry into IWC
At $6,210 this reference is one of the more affordable ways to wear a IWC 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
The price has fallen by -23.4% over the past four months. No crash, but a clear downward trend. Buyers currently have room to negotiate; sellers are better off waiting for the market to bottom out — unless they have to sell.
Watch out for swings: This reference has an above-average volatility of 98.8 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 IWC Aquatimer 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 Aquatimer 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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