Mens Girard Perregaux Laureato EVO 3 Perpetual Calendar Watch, 18kt rose gold case (44mm diameter, 15.10mm thickness) with screw-down crown and pushers, crocodile leather strap with 18kt rose gold buckle, grey "waffle" dial with luminous rose gold hands and luminous hour markers, day/date/month perpetual calendar functions, 44 jewel GP #Q031C0 self-winding mechanical movement with chronograph functions, scratch-resistant sapphire crystal, water-resistant to 30 meters.

The perpetual calendar mechanism enables the date display to take into account the different lengths of the months automatically, including leap years: it is a mechanism based on a cam, a so-called ?twelve-cam? (which completes one rotation every 12 months), and a wheel called the ?forty-eight? (which completes one rotation every forty-eight months, or four years) enabling the inclusion of 29th February, each leap year.