IWIW379402-Aquatimer Perpetual Calendar Digital Date-Month


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  • 18 ct red gold / titanium case
  • Automatic, self-winding
  • Black rubber strap with IWC-patented quick-change system
  • Diameter 49.0 mm

You may return your purchase to the Client Relations Center within fourteen (14) days of receipt for exchange or a refund to the original credit card.

IWC will accept products returned to us within fourteen (14) days of the date of the delivery, in its original packaging in a new and unused state, with all materials and documents included and in accordance with the Conditions of Sale.

Personalized IWC products (engraved or otherwise) cannot be returned to IWC for exchange or refund. All returns will be subject to strict Quality Control (QC) by IWC to ensure that the returned products satisfy these requirements. If the products do not meet QC standards, IWC will refuse the return, and the products will be sent back to the Customer or the Gift Recipient, as applicable. If the returned product satisfies Quality Control (QC), IWC will proceed with the applicable refund or exchange.

This watch is available in different materials and colours

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IW379402 Specifications



  • 18 ct red gold / titanium case
  • Diameter 49.0 mm
  • Height 19.5 mm
  • Screw in crown
  • See-through sapphire glass back
  • Water resistance 10 bar



  • 89801 Calibre
  • IWC-manufactured movement
  • Automatic, self-winding
  • 68 hours Power Reserve
  • Frequency 28800.0 vph (4.0 hz)
  • 51 Jewels
  • Côtes de Genève, perlage



  • Perpetual calendar with large double-digit displays for date and month and leap year display
  • Chronograph function with hours, minutes and seconds
  • Hour and minute counters combined in a totalizer at 12 o’clock
  • Flyback function
  • Mechanical external/internal rotating bezel with SafeDive system
  • Sapphire glass, convex, antireflective coating on both sides
  • IWC bracelet quick-change system
  • Small hacking seconds
  • Limited to pieces



  • Blue dial with luminescence



  • Black rubber strap with IWC-patented quick-change system
  • Strap width 22 mm

The Aquatimer Perpetual Calendar Digital Date-Month Story

With its impressive case diameter of 49 millimetres, the Aquatimer Perpetual Calendar Digital Date-Month turns heads both on land and underwater. The combination of 18-carat red gold with a blue dial and titanium gives the watch an appearance that is at the same time luxurious and sporty. In order to advance its large month display discs, the watch requires more power than the in-house automatic 89801-calibre movement can provide. When the date display advances at night, therefore, the quick-action switch taps a little of the energy, stores it, and then discharges it at the end of the month. The date and month discs have semi-transparent perforated covers that provide a view of the complex mechanism within. The rotor behind the see-through sapphire-glass back is distinctly functional-looking and likewise alludes to the reliability of research submarines. The exclusive flagship of the collection is limited to 50 watches and water-resistant to 10 bar.

Calibre Family 89000

The 89000-calibre family includes powerful chronograph movements with flyback function, which are used, for example, for the big digital date and month displays or for watches that display stopped hours and minutes on a subdial.

Perpetual calendar with digital date and month displays

The perpetual calendar with four display discs consists of 185 individual parts and shows the date and month with large digits in separate windows. It also features a leap year display in a small window.

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