The perpetual calendar-or quantième perpétuel ("QP") for the Francophones among us-has been kicking around the horological world for nearly three centuries. Thomas Mudge, an English watchmaker, was the first to build a pocket watch that displayed the day,

Audemars Piguet’s first crop of newness this year celebrates the brand’s 150th anniversary. To celebrate, it's launching a new perpetual calendar.

With Audemars Piguet turning 150 this year, anticipation has been building as to what the much-loved Swiss watchmaker will do to celebrate such a major milestone. Here's a look at what's being unveile

Audemars Piguet is calling time on its Calibre 5135 automatic perpetual calendar movement, which has been at the heart of its most complicated timekeepers for the past decade. The movement is given a swansong in a limited edition Royal Oak Perpetual Calendar Openworked limited edition that arrives 150 years after AP made its first perpetual

Audemars Piguet is 150 years young! Founded in 1875 in Le Brassus, a small mountain town about an hour’s drive outside Geneva, Switzerland, the brand grew slowly and organically from a family business