IWC Ingenieur 40 Aqua Blue Dial IW328903
All photos are of the actual watch for sale.

IWC Ingenieur 40 Aqua Blue Dial IW328903

Original price was: $19,300.00.Current price is: $15,495.00.

Price includes 10% GST for Australian customers

Price includes 10% GST for Australian customers

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Case Materials: Stainless Steel
Colour: Aqua, Blue
Condition: Like-New, Mint
Contents of delivery: Full Set with Box and Papers
Model Name: Ingenieur
Size: 40mm
Year: 2026
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IWC Ingenieur Automatic 40 — Genta’s design, reimagined

The Ingenieur is one of the few luxury sports watches with an unbroken line to the golden era of integrated-bracelet design. Gérald Genta — the designer behind the Royal Oak and the Nautilus — applied the same integrated-bracelet philosophy to the IWC Ingenieur SL in 1976, producing a 40mm anti-magnetic tool watch with a distinctive round bezel secured by five polygonal screws and a bracelet that flowed directly from the case without a visible lug-to-bracelet gap.

When IWC relaunched the Ingenieur in 2023, it chose to honour that 1976 design rather than reinterpret it. The Ingenieur Automatic 40 is a comprehensively re-engineered watch built around Genta’s original visual architecture — the five-screw bezel, the round case, the integrated bracelet — but updated with a manufacture movement, improved ergonomics, and dial configurations that didn’t exist in 1976.

The aqua dial version, reference IW328903, is the most visually arresting of the launch references. It is the one that collectors and press reached for first.

The aqua “Grid” dial — what makes it distinctive

The dial is not simply aqua-coloured. It carries IWC’s “Grid” structure: small lines offset at 90 degrees to each other, creating a textured surface that catches and fragments light differently depending on angle and lighting conditions. The result is a dial that reads as blue in some lights, green in others, and something between the two in natural daylight. It is one of the most dynamic dial finishes in the current IWC catalogue, and it reads as deliberate rather than decorative — the texture gives the dial depth without adding visual noise.

Rhodium-plated hands and applied hour markers are luminescent throughout, with a date aperture at 3 o’clock. The dial is legible — an IWC requirement — but the aqua Grid finish is what makes this reference the standout of the Ingenieur 40 line.

The watch in detail
  • Reference: IW328903
  • Year: 2026
  • Case: 40mm stainless steel, approximately 10.8mm thick, screw-down crown
  • Bezel: Fixed, round, screwed to casing ring with five polygonal screws — the Ingenieur signature
  • Dial: Aqua, “Grid” structure (lines offset 90°), rhodium-plated applied hour markers with luminescence, date at 3 o’clock
  • Hands: Rhodium-plated, luminescent
  • Crystal: Flat sapphire with anti-reflective coating on inner surface
  • Caseback: Solid
  • Anti-magnetism: Soft-iron inner case protecting the movement
  • Water resistance: 100m / 10 bar
  • Bracelet: Integrated stainless steel H-link, butterfly folding clasp with push-button release
  • Movement: IWC-manufactured Calibre 32111, automatic, pawl winding system
  • Power reserve: 120 hours (five days)
  • Frequency: 28,800 vph (4 Hz)
  • Set: Full — original IWC box, papers, and documentation
Condition

Mint. This is a recently purchased piece in the finest possible pre-owned condition.

120 hours of power reserve — why it matters

The Calibre 32111 delivers five days of power reserve from IWC’s pawl winding system. In practical terms, this means the Ingenieur can sit unworn from Friday evening until Monday morning without stopping — a standard working week does not require hand-winding on Monday. At 120 hours, the Ingenieur Automatic 40 offers one of the longest power reserves in the integrated-bracelet sports watch category, comfortably exceeding the Rolex Submariner (70 hours), the Audemars Piguet Royal Oak (60 hours), and the Patek Philippe Nautilus (45 hours).

Anti-magnetism — the Ingenieur’s founding purpose

The original Ingenieur was designed in 1955 as a precision instrument for engineers working in environments with strong magnetic fields — the kind that would affect a conventional lever escapement and cause the watch to run fast or slow. The soft-iron inner case in the Ingenieur Automatic 40 continues that tradition directly: it shields the movement from external magnetic fields without requiring a paramagnetic escapement. It is a practical feature, not a heritage badge.

Buying from Calibre24

Calibre24 is a Perth-based dealer specialising in pre-owned Rolex, Patek Philippe, Audemars Piguet, Vacheron Constantin, and Richard Mille — and selected exceptional pieces from IWC Schaffhausen. Every watch is authenticated in-house before listing. This IW328903 ships fully insured to any address in Australia. Viewings by appointment in Perth. Trade-in and consignment available.

FAQ

Is this IWC Ingenieur Automatic 40 available in Australia? Yes. This 2026 IWC Ingenieur IW328903 in aqua dial is held in Perth by Calibre24, and ships fully insured to any address in Australia including Sydney, Melbourne, Brisbane, and Adelaide. Viewings available in Perth by appointment.

What is the IWC Ingenieur Automatic 40 IW328903? The IW328903 is the aqua dial version of the IWC Ingenieur Automatic 40, introduced as part of IWC’s 2023 relaunch of the Gérald Genta-designed Ingenieur SL. It has a 40mm stainless steel case with the Ingenieur’s signature five-screw bezel, an integrated H-link steel bracelet, and a textured “Grid” aqua dial that shifts between blue and green depending on the light. It is powered by the IWC-manufactured Calibre 32111 with 120 hours of power reserve and a soft-iron inner case for anti-magnetic protection. Water resistant to 100m.

Who designed the IWC Ingenieur? The modern Ingenieur design traces directly to Gérald Genta, the Swiss watch designer who created the integrated-bracelet sports watch form in the 1970s. Genta designed the Royal Oak for Audemars Piguet in 1972 and the Nautilus for Patek Philippe in 1976, and in the same year applied the same integrated-bracelet language to the IWC Ingenieur SL. The 2023 Ingenieur Automatic 40 relaunch consciously restores Genta’s original five-screw bezel and bracelet-to-case flow rather than reinterpreting it.

What is the “Grid” dial on the IWC Ingenieur IW328903? The Grid dial is IWC’s name for a textured dial surface constructed from small lines offset at 90 degrees to each other. On the aqua reference IW328903, the Grid structure creates a dial that shifts between blue and green depending on the angle and light source. In natural daylight it reads as aqua; in warmer indoor light it shifts toward blue-green. The texture adds depth and visual interest without compromising legibility — the rhodium-plated hands and applied luminescent markers remain clear at all angles.

How long is the power reserve on the IWC Ingenieur Automatic 40? The Calibre 32111 delivers 120 hours — five full days — of power reserve via IWC’s pawl winding system. This makes the Ingenieur Automatic 40 one of the longest-reserve integrated-bracelet sports watches currently available, exceeding the Rolex Submariner (70 hours), the AP Royal Oak (60 hours), and the Patek Nautilus (approximately 45 hours). The watch can sit unworn from Friday to Monday without stopping.

What is the anti-magnetic protection in the IWC Ingenieur? The Ingenieur Automatic 40 uses a soft-iron inner case to shield the Calibre 32111 from external magnetic fields. The soft-iron acts as a Faraday cage around the movement, deflecting magnetic interference before it reaches the escapement. This continues the Ingenieur’s original 1955 design intent as a precision instrument for engineers and technical professionals working near magnetic equipment.

How does the IWC Ingenieur compare to the Royal Oak and Nautilus? All three descend from Gérald Genta’s integrated-bracelet sports watch concept of the 1970s. The Royal Oak (AP, 1972) and Nautilus (Patek, 1976) are octagonal and porthole-bezel designs respectively; the Ingenieur SL (IWC, 1976) is a round-bezel design with five visible screws — a different expression of the same philosophy. The Ingenieur typically trades at a significant discount to Royal Oak and Nautilus prices on the secondary market, while sharing the same Genta lineage and integrated-bracelet format. For a buyer who values the design heritage at a more accessible price point, the Ingenieur is the logical entry.

Does this IWC Ingenieur come with box and papers? Yes — complete full set with original IWC box and papers.

Can I sell or trade in my IWC or other luxury watch? Yes. Calibre24 buys and takes consignment on IWC, Rolex, and other high-end references. Contact us for a current valuation.

Ingenieur 40 IW328903

Mint, Like New

Full Set with Box & Papers

Late 2025

Aqua Blue-Green

40mm

Stainless Steel

AUD

Shipping: Fully insured and express shipping available at a small cost.

Payment methods: Bank Transfer, EFTPOS, Credit or Debit (Master/Visa/AMEX) cards accepted. We do not accept crypto or cash payment.

Customers from any other country (outside of Australia) will be responsible to pay for any import taxes, customs and/or duties, as applicable, by their country laws. Our price doesn’t include any VAT, GST or any duties for any countries when the item is exported out of or shipped outside of Australia.

We are a licensed Australian Second Hand Watch Dealer, and one of the largest and safest Australian online watch platforms located in Perth, WA, and have delivered watches to watch enthusiasts across Australia and beyond. Please read our reviews across any platforms online to see what our customers say about their experience of an online purchase of a luxury watch from us.

Please refer to our website FAQ’s section for more details or reach out to us at Hello@calibre24.com.au with any queries.

Second Hand Dealer License No. SHD-79453.

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  • The watches are sourced from our trusted partner network, most of which are reputed businesses of the industry.
  • We inspect the finer details of the watch upon receiving, which includes an in-depth inspection of the dial, the movement and finer components.
  • The watch is tested and verified using sophisticated and modern Swiss machines we have available in-house. This includes:
    • Watch movement health check which includes its movement timekeeping/accuracy, amplitude a
    • Upon authentication and examination, a pressure testing is completed to evaluate its water resistance

You are also welcome to authenticate the watch when you receive it from us. Our return policy is that you can return any watch you purchase from us within 01 day if you find any issues or if the watch is not as we described it to be, to receive a full refund.

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If, when we deliver the watch to you, you don’t find the watch in the condition as we’ve advertised it in, you can return it to us for a full refund — refer to our Returns policy.

We describe the condition of watches as below:

Brand New:

  • The watch is unused, and new in condition.
  • There are no signs of use but there may be some handling marks. The handling marks mostly apply to older year/older stock pieces inherently from storage, handling etc. but can sometimes exist on recent year/fresh stock pieces too.
  • Photos on the listing form part of the condition disclosure.

Unworn:

  • The watch is not worn or used but there may be some light marks from storage and handling.
  • The watch may be New-old-stock (NOS), not current dated (the date on the card is previous year)
  • Photos on the listing form part of the condition disclosure.

Mint:

  • The watch is not unworn, but it’s carefully and lightly used. There may be little to no signs of use, hairlines, surface marks with no deep dents or scratches of note unless you inspect up close, at a particular angle or using a loupe etc. i.e. the marks may not be discernible in day-to-day wear.
  • The watch may have been lightly refinished/polished to make it retail ready, unless specified otherwise.
  • No dents or dings visible to unaided human eye or can be physically felt when you rub your finger over the surface.
  • No chips on the crystal visible to unaided human eye.
  • No cracks on the crystal.
  • Movement running adequately and the watch is keeping time.
  • Photos on the listing form part of the condition disclosure.

Excellent:

  • The watch has light signs of use and/or wear.
  • There may be little dents, surface roughness, or minor nicks on the case and/or bracelet.
  • The movement may need servicing.
  • The watch may have been refinished/polished.
  • Crystal may have light chips but no cracks i.e. the water resistance of the watch is not compromised.
  • Photos on the listing form part of the condition disclosure.

Good:

  • The watch has obvious signs of wear or use.
  • There may be dents, edges deformed and obvious imperfections.
  • The crystal may have a crack(s) and/or chips.
  • The movement needs servicing, and the watch doesn’t keep time well.
  • Photos on the listing form part of the condition disclosure.

We have sold thousands of watches and delivered them to our customers across Australia and beyond. Please check out our reviews from our customers on Google, Facebook or Chrono24 to see what they say about us after their online purchase of a luxury timepiece from us.

The overnight express is the name of the service used. It doesn’t guarantee that you will receive the watch the next day. However, the service does aim to deliver overnight and in most instances, we have delivered watches the next day. The delays on the other hand, are also possible and are not something that we haven’t seen before. We request ordering 3-4 business days in advance to allow for shipping delays, payment delays etc.

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Yes, we accept payment in USD, however, our prices listed are all in AUD. To get the accurate USD price for the watch that you may be interested in, please reach out to us and we will provide you the quote based on currency rate at the time.

When you make payment via Bank Transfer, we endeavour to ship the products at the same day or next business day when we receive your payment into our bank account. However, in some circumstances it can take up to 4-7 Days to ship an item, using the following carriers: Fedex/TNT, DHL, Auspost, Brinks or Ferrari.

When you make payment via Credit or Debit Card, we apply a “Security Hold” for 2 full business days from the date of the payment, before we will ship the item to you. Once the security hold is completed, we endeavour to ship the products the next day. However, in some circumstances it can take up to 4-7 Days to ship an item, using the following carriers: Fedex/TNT, DHL, Auspost, Brinks or Ferrari. Please click here to view the shipping policy

Due to the premium service we use, and the insurance for high value of watches, our shipping partners also require one day notice to book/process the shipments especially if you’re ordering a watch above $50,000 AUD in value.
Please get in touch with us prior to placing the order if your order is urgent and we can work out the quickest solution for you. You can email us on Hello@calibre24.com.au

Yes, you can inspect any timepiece we have in stock in our appointment-only boutique in the heart of Perth CBD. To request a viewing or purchase in person simply submit a viewing or purchase request through our product page for the timepiece you’re interested in, and we’ll organize a time for you.

Yes, we are a GST registered business for Australian customers, and all the prices include GST, unless otherwise specified in the listing. Please note that some watches we have available are listed for overseas clientele, which do not have the Australian GST component added into the listed prices. This is categorically mentioned on the listing as it applies and added to the price when sold to customers residing in Australia.

Yes we have sold and delivered countless watches overseas and globally. If you are located in the USA, then we can also offer you a price estimate for the watch delivered to you with all taxes and duties paid by us i.e. our price will include import taxes into the US and insured shipping – and you will pay nothing more to receive the watch.

We are not affiliated with any watch brand or watchmaker, and as such we are not Authorised Dealers for any watches that we sell. We specialize in buying and selling pre-owned and preloved watches, although most of the watches we deal in are in unworn and new condition.

We are an independent business, founded, run and managed by a watch collector and enthusiast Hafiz J Mehmood.

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