First introduced to the market in 2004, the De Bethune DB15 Perpetual Calendar debuted the brand’s spherical moon phase. Reimagined and broke the boundaries of the interpretation of a moon phase, the three dimensional marvel emerged from a sub-dial at 12 o’clock and rotates on its own axis. The layout of the stepped dial is clean and legible with a classic touch of Roman numerals.

According to research, three metals were available for the model: white gold, platinum and pink gold like the present example. To our knowledge only 44 pieces of the DB15RT were made since 2004. Belonging to one of the early creations from De Bethune recongized by the cone-shaped lugs, the timepiece is sized at 43.4mm diameter. The perpetual calendar mechanism powered by the caliber DB2004 was also the first to be produced entirely at the manufacture and is equipped with the world-first function of rapid date adjustment by and intermediate position of the winding crown. The leap year indication is indicated by the aperture below the spherical moon phase amongst the starry sky.

Turning the watch over, the movement immediately speaks De Bethune. A signature delta-shaped bridge decorated with Côtes de Genève and proudly stamped with the brand’s logomark. Featuring a titanium balance with platinum weights, the movement is also equipped with a 5 days power reserve, triple pare-chute shock absorbing system and balance-spring with flat terminal curve.

Preserved in an attractive condition, the case has furthermore developed charming patina that can only be achieved through time. Numbered 21, this DB15RT in pink gold is also accompanied by its original certificate and accessories.