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  • Technical
  • Calendar
  • Astronomical indications

Portugieser Perpetual Calendar

IWC 2015

ref. IW503401 / IW503404
Men's

IWC: Portugieser Perpetual Calendar

The new Portugieser Perpetual Calendar with double moon phase features the customary display of the date, day of the week, month and four-digit year, but the mirror-style depiction of the lunar cycles in the northern and southern hemispheres has been modified. For the first time, the countdown mode indicating the number of days remaining until the next full moon has been dropped. Instead, the designers have dreamed up a star-studded night sky matching the dial colour, on which they have integrated a railroad-type minute track typical of classical models. The new midnight blue or slate grey dials are thus even more understated and elegant.

Function

  • Function
    Hours, Minutes, Small seconds

Complications

  • Astronomical indications
    Moon phases
  • Calendars
    Perpetual calendar
  • Display
    Power-reserve indicator

Movement

  • Movement name
    Calibre 52615
  • Energy supply
    Self-winding
  • N° of jewels
    54
  • Power reserve
    168 hours
  • Vibrations
    28800
  • Form
    Round
  • Diameter
    mm

Case

  • Form
    Round
  • Material
    White gold / red gold
  • Height/thickness
    15.3 mm
  • Diameter
    44.2 mm
  • Back
    Sapphire
  • Water-resistance
    30 m

Dial

  • Colour
    Midnight blue / slate grey

Strap

  • Material
    Alligator
  • Colour
    Black
  • Fastening
    Folding clasp