Portugieser Annual CalendarThe Annual Calendar watch from IWC has a sapphire crystal case back through which one can see the new manufacture caliber 52850. It shows the month, the date, and the day of the week in three separate semicircular windows.
- Material: 18 k rose gold with an alligator-skin watch band
- Movement: Mechanical, manufacture caliber 52850
- Diameter: 44.2 mm
- Water-resistance: 3 bar
- Wempe reference: IW120039