Case is 39.4 mm diameter with a thickness of 12.23 mm, in 18K MoonshineM Gold, featuring polished facetted “dog-leg” lugs with vertically brushed sides. Bezel carries polished facets, paired with a polished crown bearing the ? logo in positive relief. Domed sapphire crystal with anti-reflective coating on both sides. Caseback is a polished and sandblasted dodecagon, engraved “Constellation, ” with sapphire display back. Water resistant to 30 meters. Movement is Co-Axial Master Chronometer calibre 8915Luxe, automatic, METAS certified, with a power reserve of approximately 60 hours. What makes this watch historically important is the testing method behind it. Developed by the Laboratoire de Précision, the new system combines acoustic measurement with optical hand-tracking, allowing a two-hand watch to complete both Chronometer and Master Chronometer testing without the need for a seconds hand. Using Dual Metric Technology, the watch is monitored continuously through the full 25-day test cycle, capturing not only timing results but also how performance is affected by temperature, position, magnetic fields, pressure, and amplitude variation. Comes on a refined gold mesh bracelet with a 9-row silk-like brick pattern and folding clasp. Priced at HK$414.000