In 2006, IWC unveiled the Portugieser Perpetual Calendar 5022. The watch boasts a self-winding 7-day movement and a clever perpetual calendar module designed by Kurt Klaus. This module was first used in the Da Vinci in 1985 and was later modified to fit the larger 7-day movement. The case size is 44.3mm and is surrounded by sapphire glass on both the front and back. One of its notable features is the 'Single Moon' moonphase display, which allows the wearer to easily read the moonphase in their hemisphere. The 5022-19 model, released in 2006, showcases a platinum case and a silver dial.