Take a closer look at this timepiece devoted to astronomy.
The true beauty of the Retrograde Annual Calendar lies in the fact that the wearer maintains a point of contact with the watch each year. The date is automatically adjusted based on the number of days in the month — 30 or 31 — but it works on the basis of 29 days for February, whether or not it is a leap year.
The moon phase on the Tonda Annual Calendar is added to the calendar indications. It is known as a "precision moon phase" because it only needs correcting once every 122 years.
The Tonda Annual Calendar is available in two versions: a rose gold case with a white grained dial – a speciality of the manufacture; a white gold case with a black opaline dial.
Featured brand
