Perpetual Secular Calender

Wristwatches with perpetual calendar usually have to be regulated manually, not so, however, the "Perpetual Secular Calender" Wristwatch, for it has a real perpetual calendar.
Various styles of cases possible
Automatic chronometer movement
Diameter 40 mm, thickness: 11 mm
White gold 63 g / sapphire crystal
Box with winding device