IWC is very proud of one of their technological inventions that is digital calendar. IWC applies the invention to Portugieser Collection. People can see date and month directly from two small windows on the dials.
IWC Portugieser fake watches with black leather straps have been applied with many advanced technologies including calendar, large digital display, leap-year display, flyback chronograph function. They are driven by calibre 89801, automatically self-winding movements which can save 68-hour power. The diameter of their steel cases is 45mm. There are another two small dials counting hour, minute and second. The rotors of replica watches with convex sapphire glasses are made of 18k red gold.
IWC copy watches with transparent sapphire-crystal backs are introduced to celebrate the 75th anniversary of the launch of Portugieser collection. There are also limited editions for fans to collect.