De Bethune DB16 Tourbillon Perpetual Calendar

De Bethune has gained a reputation for their innovation in striving to create a more accurate watch using different designs and materials.

David Zanetta and Denis Flageollet deserve tremendous praise for creating such beautiful and complicated timepieces with technical precision.

I have always loved their take on displaying the moonphase using a spherical ball instead of a disc.  The intense blue of the hands on their watches is captivating.

A. Lange & Söhne 1815 Rattrapante Perpetual Calendar

The 1815 Rattrapante Perpetual Calendar melds the technical fascination of a rattrapante chronograph with the enduring precision of a perpetual calendar that does not need to be corrected until the year 2100, and then by only one day.

The meanwhile eighth chronograph calibre developed by A. Lange & Söhne is yet another manifestation of the brand’s exceptional competence in this apotheosis of precision watchmaking. With a rattrapante chronograph, a perpetual calendar, a moon-phase display, and a power-reserve indicator, it unites more horological complications than the well-organised dial suggests at first sight.