Portugieser Perpetual Calendar

The Portugieser's Legacy

The Portugieser at its most complicated — Kurt Klaus's perpetual calendar mechanically knows the length of every month and leap year, and its double moonphase stays accurate to a single day over 577 years.

The IWC Portugieser Perpetual Calendar, Reference IW503302, in 18k 5N rose gold. 44.2mm case with a sapphire exhibition caseback. Silver-plated dial with a perpetual calendar — date, day, month, four-digit year, and a double moonphase — plus a power-reserve indicator and small seconds. Fitted on an alligator leather strap with an 18k rose gold folding clasp.

Powered by the IWC Calibre 52610, a Pellaton self-winding movement with a seven-day (168-hour) power reserve, 54 jewels, and a 4 Hz (28,800 vph) frequency.

Specifications

Brand

IWC

Model

Portugieser Perpetual Calendar

Reference Number

IW503302

Case Diameter

44.2mm

Bracelet Style

Leather Strap