PRE-SIHH 2015 : IWC Portugieser Annual Calendar


Another SIHH has come around, and this time it is the turn, on the occasion of its 75th birthday, for the IWC ‘Port’ collection to get updated. There will be a number of new models (two new and six revisions) and new calibres, including a new perpetual calendar, but the first cab off the IWC rank for the new pieces is a talking piece – a new Annual Calendear (Ref. 5035). In thinking about the IWC owners I’ve known, the most widely owned collection has actually been the Portugieser, so perhaps from the brand’s point of view, this bodes well in terms of interest in the upcoming offerings.

The Annual Calendar (Ref. 5035) is IWC’s first annual calendar and fits into the gap between the perpetual calendar and the simple date. Its very balanced dial shows the month, date and day in three separate semi-circular apertures at 12 o’clock, all courtesy of the new IWC-manufactured Cal.52850 with a seven day power reserve and two mainspring barrels.

The annual calendar indicators at 12 o’clock” on the dial show month, date and day in three separate apertures in what has been referred to as an ‘American’ style display, in homage to IWC’s American founder F.A. Jones. Whether you prefer it this way or whether you prefer to read your dates as day of the week followed by the date followed by the month will be down to cultural differences, I susepct.

Aesthetically it is like the automatic Ports but at 44.2mm and a thickness of, thicker than the Automatic, which is 42.3mm with a thickness of 14mm. The new model has an open sapphire caseback.
For those unfamiliar with this complication an annual calendar, unlike a perpetual calendar, will need to be adjusted on leap years.

The new watch will come in three models : two steel ones with either a midnight blue or silver-plated dial, and an 18k red gold on with a silver-plated dials.


– Mechanical movement : Pellaton automatic winding
– Power reserve display
– Annual calendar with displays for the date, day and month
– Small hacking seconds at 9 o’clock
– Glucydur® beryllium alloy indexless balance with high-precision adjustment screws on balance rim
– Breguet spring
– See-through sapphire-glass back
– Rotor with 18-carat gold medallion



– Movement: IWC-manufactured calibre 52850
– Frequency: 28,800 A/h / 4 Hz
– Jewels: 36
– Power reserve: 7 days (168 h)
– Winding: automatic



– Materials:
Ref. IW503501: case in stainless steel, silver-plated dial, black alligator leather strap, folding clasp in stainless steel
Ref. IW503502: case in stainless steel, midnight blue dial, black alligator leather strap, folding clasp in stainless steel
Ref. IW503504: case in 18-carat red gold, silver-plated dial, black alligator leather strap, folding clasp in 18-carat red gold
– Glass: sapphire, arched edge, antireflective coating on both sides
– Water-resistant: 3 bar
– Diameter: 44.2 mm
– Case height: 15.3 mm

Categories: IWC, SIHH 2015, watches


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