Calendar Watch. At 40 millimetres, the portofino perpetual calendar is the smallest perpetual calendar in iwc’s portfolio. Bringing the attention to a more niche brand, we have parmigiani fleurier with their tonda pf annual calendar.
In modern watchmaking, a perpetual calendar indicates the date, and corrects automatically for months with less than 31 days, as well as leap years. We haven’t seen a new ipad in years, but apple seems likely to change that in just a few weeks.