Equation of Time

The Marc & Darnò Equation of Time 2026 is a 39 mm timepiece crafted in tantalum, featuring an aventurine dial and white gold hands accented with yellow gold for the solar motif. At its heart lies an in-house, manually wound movement operating at 28,800 A/h, offering approximately 38 hours of power reserve.

This watch combines terrestrial time with astronomical indications, including the meridian equation for true solar time, an annual calendar, and an ultra-precise moon phase display with only one day of error every 122 years. Protected by a sapphire crystal and water-resistant to 50 meters, it includes a pressure crown with double O-ring and an exotic leather strap. Customization options extend to case materials such as stainless steel, gold, or titanium, as well as bespoke dials and straps, making each piece a unique expression of horological artistry.