I was also buoyed by the range of designs in use. Normally, perpetual calendars all look fairly similar, with a commonality that has become part and parcel of watch design in general. This year ...

Calendar systems include solar and lunar calendars that guide planting and harvest as well as synchronized electronic appointment books that keep modern societies humming along. Perpetual calendars ...

The ultra-thin new Piaget Polo Perpetual Calendar watch now features completely unique stone dials in blue and green hues ...

Audemars Piguet’s new Royal Oak Perpetual Calendar is a very clever piece of engineering, an answer to a problem that’s been annoying watchmakers and collectors for decades, which is this. QPs, as ...

The Ingenieur Automatic 35, seen here in 5N gold, expands upon the reborn 1976 Genta design. Photo by Jack Seemer for Gear ... The gorgeous Ingenieur Perpetual Calendar comes at a price that seriously ...