IWC Portugieser Perpetual Calendar
IW503312
2-year warranty, extendable to 8 years. Register here
*Available On Special Order
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The Portugieser Perpetual Calendar showcases the brand’s innovative perpetual calendar, developed by Kurt Klaus in the 1980s. This sophisticated complication automatically adjusts for different month lengths and leap years and requires no correction until 2100. The watch displays the date, weekday, month, moon phase, and a four-digit year indicator on four sub-dials, with a power reserve display complementing its intricate design. The 18K Armor Gold case houses a deep blue dial, gold-plated hands, and 18K gold appliqués. Driven by the IWC-manufactured 52611 calibre, it features a ceramic-enhanced Pellaton winding system that provides an impressive seven-day power reserve.
Full Specification
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Brand IWCCollectionPortugieserSeriesN/AModel NoIW503312
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MovementFeatures Day-Date, Moon Phase, Perpetual Calendar, Power Reserve Indicator, Small Seconds, Month, YearMovement AutomaticCalibre 52611CaseCase Size 44.2 mmCase Thickness 14.9 mmCase Shape RoundCase Material Armor Gold®Case Back See-through Case BackLug Width 22 mmGlass Material Sapphire CrystalDialDial Colour BlueHands LeafIndexes Arabic NumeralsStrapStrap Material LeatherStrap Colour BlueClasp Type Butterfly ClaspBuckle/Clasp Material Armor Gold®OtherGender MenWater Resistance (M) 30Warranty Period 2-year warranty, extendable to 8 years. Register hereCountry of Origin Switzerland
Product Video
Collection Video Discover the Portugieser Collection
About the IWC Portugieser Collection
History
In the late 1930s, IWC Schaffhausen received a request from two Portuguese merchants who requested a wristwatch with the precision of a marine chronometer for the captains and officers of Portugal's merchant navy. To fulfil this, Schaffhausen adapted its pocket watch movements, calibres 74 and 98, leading to the creation of a larger wristwatch, first introduced in 1939.
Design And Iterations
The Portugieser's design is distinguished by its large, round case, which offers a clear and easily readable dial. Arabic numerals, slim feuille hands, and a railway-track-style chapter ring are all elements that contribute to its classic appearance. Their watch's minimalistic design, featuring a slim bezel and an uncluttered dial, is a hallmark of IWC's commitment to functional elegance. Over the years, the Portugieser collection has expanded to include various iterations while still maintaining the original's iconic design and introducing unique elements. The Portugieser Automatic offers a balanced dial with a small seconds sub-dial at six o'clock and a power reserve indicator, powered by IWC's Pellaton winding system, ensuring a seven-day reserve. The Portugieser Chronograph enhances the collection with complications such as dual sub-dials positioned at 12 and six o'clock. Meanwhile, the Portugieser Perpetual Calendar stands out with their perpetual calendar function and IWC-manufactured 52610 calibre movement.
The Portugieser Yacht Club takes a sportier approach, incorporating a flyback chronograph and variants like the Moon & Tide, featuring tide and moon phase indicators, including special editions like the "Orlebar Brown" collaboration. Despite their differences, each iteration preserves the Portugieser's timeless elegance and horological precision. Additionally, the collection includes special editions like the Portugieser Grande Complications, combining a perpetual calendar and chronograph, and the Monopusher Edition “Laureus Sport For Good,” limited to 500 pieces. Despite their differences, each iteration preserves the Portugieser's original design while offering unique features that appeal to different watch enthusiasts.

ABOUT THE MOVEMENT
The IWC calibre 52611 is a highly advanced automatic movement that showcases precision and innovation. Powered by IWC’s efficient Pellaton winding system, it offers an impressive 168-hour power reserve via twin barrels, operating at a frequency of 28,800 vibrations per hour (4 Hz). Comprising 381 finely crafted components and 54 jewels and blue screws, this calibre is a testament to IWC’s engineering excellence. Notably, it incorporates Kurt Klaus’s revolutionary perpetual calendar, introduced in 1985, which mechanically translates the complexities of the Gregorian calendar. With just 80 components, it displays the date, day, month, year in four digits, and moon phase, automatically adjusting for month lengths and leap years. The moon phase is so precise that it deviates by only one day every 577.5 years.
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- Brand IWC
- Reference 52611
- Movement Automatic
- Display Analog
- Power Reserve approx. 168 hours
- Jewels 54
- Frequency 28800 bph
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