This is one of the most recognisable perpetual calendars on the market.
This timepiece belongs to a friend of mine. Simply a beauty in every respect. The Portuguese range is an icon for IWC and although they have several iterations of this timepiece, I like the rose gold black dial the most.
There are several variants out there but this rose gold black dial is one of my favourites. Then there is the white gold blue dial version which is also very handsome. Whatever the case is, I will settle for any variant of the IWC Portuguese Perpetual.