Audemars Piguet Royal Oak Perpetual Calendar /Root/Start/Glashütte Original/Pano Two balance wheels on a

Two balance wheels on a single axis distribute the oscillation and improve rate accuracy

understated

The stainless steel case with a diameter of 46 mm creates a powerful impression on the wrist

In addition to the calendar with month and day-of-the-week display

The calibre bears the designation TH31-00 COSC

Audemars Piguet Royal Oak Perpetual Calendar /Root/Start/Glashütte Original/Pano Two balance wheels on aAudemars Piguet Royal Oak Perpetual Calendar (Reference 26674SG. OO. 1320SG. 01) Sandgold is an alloy developed by Audemars Piguet with a warm, matte tone that sets it apart clearly from classic rose or yellow gold. Reference 26674SG. OO. 1320SG. 01 executes the case, bracelet, and dial in this material. The Perpetual Calendar displays the date, day of the week, month, and moonphase, automatically accounting for leap years. Calibre 5135 offers 40