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  • Technical
  • Calendar

Portugieser Annual Calendar

IWC 2015

ref. IW503501/IW503502/IW503504
Men's

In 2015, the year of the Portugieser watch at IWC, the brand rolls out a complication it had never produced to date: an annual calendar. Mid-way between a simple calendar and a Perpetual Calendar, it requires correction just once a year at the end of February. A clever system means this adjustment can be simply and easily made via the crown. The month, date and day of the week appear through apertures at 11, 12 and 1 o’clock, an “American-style” display that is a nod to F.A. Jones, the American founder of IWC.

Function

  • Function
    Hours, Minutes, Small seconds

Complications

  • Calendars
    Annual calendar
  • Display
    Power-reserve indicator

Movement

  • Movement name
    Calibre 52850
  • Energy supply
    Self-winding
  • N° of jewels
    36
  • Power reserve
    168 hours
  • Vibrations
    28800
  • Form
    Round
  • Diameter
    mm

Case

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

Dial

  • Colour
    Silver-toned/midnight blue/silver-toned

Strap

  • Material
    Alligator
  • Colour
    Black
  • Fastening
    Folding clasp