To deal with the masterful complication represented by the perpetual calendar, Girard-Perregaux has designed a Graduate where information is arranged in a dynamic and unconventional balance.
The caliber GP01800-0033 presents a very useful complication, developed and produced internally that displays the date, days, months and leap years in a unique and distinctive way, making the information very easy to read. This complication only needs to be corrected once a century thanks to its mechanical memory of 1,461 days, which corresponds to 4 years.