IWC Presented Portugieser Annual Calendar In Memory Of 75th Anniversary IWC Luxury Watches Swiss watches by wholesalewatches - December 24, 20150 The Portugieser family has been a platform for a number of different complications over the years, from self-winding chronographs to perpetual calendars, and all the way up to the very complex and extremely mechanically interesting Siderale Scafusia now they presented the new calender-Portugieser Annual Calendar.this watch is celebrate to IWC