The IWC Aquatimer is a mechanical dive-watch family, not one fixed specification. Its defining feature is an internally rotating dive-time bezel operated from outside the case; the current Automatic is listed in a 42 mm size, while the current Chronograph is listed at 44 mm and rated by IWC to 300 metres. Older references vary in size, water resistance and movement, so compare the exact reference—not just the Aquatimer name—before buying.
How the Aquatimer’s bezel works
The Aquatimer displays elapsed dive time on an internal rotating bezel. Rather than turning a conventional bezel directly at the edge of the dial, the wearer controls the internal scale from outside the case. IWC says of the current Automatic: “The IWC SafeDive system ensures that it can only be rotated counterclockwise, preventing accidental extension of the dive time.” IWC Aquatimer Automatic
That counter-clockwise-only limitation is a safety-oriented design choice: an accidental turn cannot move the indicated end time later and thereby extend the displayed dive duration. The operating details are model-specific. An IWC manual describes an internal rotating bezel adjusted anti-clockwise via a reset button, and lists 12 bar for the watch covered by that manual; that rating should not be applied to the current Aquatimer line as a whole. IWC Aquatimer Chronograph operating instructions
Current Automatic versus Chronograph
IWC’s current collection pages distinguish the models most clearly by nominal size and complication. The available excerpts do not provide a matching set of reference-level specifications for both current models, so the table separates what IWC states at collection level from what is documented for named references.
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- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
| Model or reference | Size | Water resistance | Movement and reserve | Other details |
|---|---|---|---|---|
| Current Aquatimer Automatic | 42 mm (collection page) | Not established in the cited product-page information | Page describes the 32000 family; model information states 120 hours, while family wording says at least 72 hours. Verify the exact reference and reserve. | Internal rotating dive-time bezel with SafeDive. |
| Current Aquatimer Chronograph | 44 mm (collection page) | 300 m / 30 bar, as presented by IWC | A single reference movement is not specified in the cited collection-page excerpt. | Chronograph and SafeDive. |
| Aquatimer Chronograph IW376806 | 44 mm | 30 bar | Calibre 79320; 44-hour reserve | Blue dial and blue rubber strap. |
| Aquatimer Chronograph IW376802 | 44 mm | 30 bar | Calibre 79320; 44-hour reserve | Past-collection reference. |
| Aquatimer Chronograph IW376709 | 45.6 mm | 12 bar | Calibre 79320; 44-hour reserve | Past-collection reference; its rating is not representative of current models. |
| Aquatimer Chronograph Edition “50 Years Science for Galapagos” IW379504 | 45 mm | 30 bar | Calibre 89365; 68-hour reserve | Flyback chronograph; past-collection reference. |
The current Automatic’s reserve wording needs care: IWC’s page-level model information says 120 hours, while its 32000-family description says at least 72 hours. Those statements are not interchangeable; confirm the specification for the precise reference being considered. IWC Aquatimer Automatic
The current Chronograph’s 300-metre claim is a collection-page statement, not a specification that can be projected onto every past Chronograph. For example, IWC lists 12 bar for IW376709, in contrast to 30 bar for IW376806 and IW376802. Current Aquatimer Chronograph collection page IW376806 product details IW376802 past collection IW376709 past collection IW379504 past collection
Rank #2
- WATER-RESISTANT: these water-resistant men's dive watches are ISO scuba-approved to depths of 200 meters
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable 43.8mm stainless steel watch case and bracelet.
- LUMIBRITE DISPLAY: this men's automatic watch features a highly-legible display with LumiBrite hands and markers
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
How large is an IWC Aquatimer?
The stated case sizes range from 42 mm for the current Automatic to 45.6 mm for the cited IW376709. The current Chronograph and IW376806 are listed at 44 mm; the special-edition IW379504 is 45 mm. These are nominal case dimensions, not a prediction of wrist comfort or visual fit. No independent fit measurements or hands-on wrist assessment are established here.
Straps, bracelets and reference checks
IWC documents quick-change straps or bracelets on applicable Aquatimer models. That does not establish that every Aquatimer accessory—or a generic third-party strap—will fit every reference. Before buying a replacement strap or bracelet, verify compatibility with the exact model and reference. IWC Aquatimer Automatic IWC Aquatimer Chronograph IW376806
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Rank #3
- Stainless steel case 40mm diameter x 14.1mm thick; Exhibition case back; Black dial; Luminous hands.Band Length: 205mm
- NH35A Japanese Automatic movement, 24 jewel; Assembled in Malaysia; Watch weight 155 grams
- Includes gift box, instructions and 3 year limited manufacturer warranty; Invicta Customer Service can be reached at 1-800-327-7682 for questions (re: Additional links, band replacement, band adjustment, warranty questions, etc.)
Is the IWC Aquatimer worth buying?
The Aquatimer is worth considering if you want a mechanical dive watch whose internal timing bezel is externally controlled and whose SafeDive system restricts rotation to counter-clockwise. The choice between Automatic and Chronograph involves more than the added chronograph function: the current models have different stated sizes, and older references bring distinct movements, reserves and water-resistance ratings. Identify the exact reference and check its official specification before deciding.
This is a review of IWC-published specifications, not an independent assessment of accuracy, reliability, comfort, dive performance or value. Current availability can also vary by region; a current collection page or a past-collection listing does not establish stock in every market. No current street-price or competitor-value comparison is established.
Quick Recap
Best Value
- Stainless steel case 43mm diameter x 12mm thick; Black dial; Luminous hands and hour markers
- Japanese quartz movement, PC32 Caliber; Assembled in Japan; SR626SW battery included; Watch weight: 170 grams
- Stainless steel band, 185mm L x 22mm W; Band is adjustable by adding/removing links; Fold over safety clasp
- Flame Fusion crystal; Screw down crown; Uni-directional stainless steel bezel with black top bezel ring; 100 meter water resistant: Suitable for recreational surfing, swimming, snorkeling, sailing and water sports. Not suitable for diving
Rank #4
- Iconic Promaster watches with advanced functions designed to venture to the deepest depths.
- 3 Hand, Date
- Silver-Tone Stainless Steel
- Luminous Hands and Markers and Mineral Crystal
- Sustainably powered by any light, with our Eco-Drive technology this watch never needs a battery. ISO Certified, 200M Water Resistant and 5 Year Limited Warranty
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
