IWC · Family: Portugieser
The IWC Portugieser Perpetual Calendar ref. IW503302 is the 44mm rose gold version of IWC's in-house perpetual calendar, powered by Calibre 52610 with Pellaton automatic winding and a seven-day power reserve. Cazador has no verified price observations yet. Its differential: a four-digit year display, unusual among rival perpetual calendars, which typically show only the last two digits.
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The Portugieser line traces back to an unusual brief: in 1939, two Portuguese merchants asked IWC for wristwatches with pocket-watch-grade precision, forcing the manufacture to house a larger-diameter movement inside a wristwatch case — hence the generous size and uncluttered dial that still define the entire family today.
Within that family, the Portugieser Perpetual Calendar carries IWC's most elaborate calendar complication. Reference IW503302 is cased in 18k rose gold, 44mm across and 15mm thick, with a silver dial and Arabic numerals following the Portugieser's classic visual language, completed by a dark brown alligator strap and a fold-over clasp in the same rose gold.
The Calibre 52610 driving it is an in-house automatic movement with the Pellaton winding system, devised by IWC watchmaker Albert Pellaton in the 1950s, which harvests energy from the rotor's motion in both directions of rotation for more efficient winding. That architecture, combined with larger barrels, gives the Calibre 52610 a full seven-day power reserve.
The perpetual calendar displays date, day of the week, month and — unlike many rival perpetual calendars, which show only the last two digits — the full year in four digits, alongside a moon phase indicator. Being a true perpetual calendar, the mechanism automatically accounts for varying month lengths, including leap years, without manual correction except in non-leap secular years, a mechanical detail typical of this complication category.
Rated to 30 meters of water resistance, the Portugieser Perpetual Calendar is built as a fine dress watch, not a sport tool. As of this writing, the reference remains in IWC's current catalog.
Cazador has no verified price observations for this reference yet. We'll publish a range once sufficient sourced market data exists.
Date, day of the week, month, the full year in four digits, and moon phase — all without manual correction except in non-leap secular years.
An automatic winding mechanism IWC developed in the 1950s that charges the mainspring using the rotor's motion in both directions of rotation, more efficient than single-direction systems.
A full seven days (168 hours), a high figure thanks to the Pellaton winding system's efficiency combined with higher-capacity barrels.
It's a distinctive trait of IWC's perpetual calendars versus much of the competition, which usually shows only the last two digits of the year.
It's rated to 30 meters of water resistance, enough for splashes, but it isn't built for swimming or diving, consistent with its dress-watch character.
Based on the catalog data we work from, the IW503302 remains in active production within the Portugieser family.