Ahead of Baselworld this year, Chopard has introduced the L.U.C Lunar One perpetual calendar with the astronomical moonphase display as a limited edition model in 950 platinum. First presented in 2005, the L.U.C Lunar One is one of the flagship models in the Chopard Haute Horlogerie’s portfolio and is distinguishable by its distinct large date and moonphase display. Named after the founder Louis-Ulysse Chopard, the L.U.C collection is the maison exhibits their best work. 

The sunburst finish radiates from L.U.Chopard logo.

For 2017, the watch gets a bit of a design refresh and a new case. A limited edition of 100 pieces, it uses a 43 mm case that features a mix of polished and brushed surfaces; it has vertical satin-brushed sides while the bezel and lugs are finely polished. 

The multi-layer deep blue dial features a sunray pattern that characteristically radiates from the L.U.Chopard logo positioned at 12 o’ clock just above the large twin-aperture date window. The perpetual calendar indications that sit on the three sub-dials use white large white fonts for easy readability. 

The moonphase display is unique and accurate to 122 years.

The large applied Roman numerals are mirror-polished and the sword hands are rhodium-plated. The moonphase indication features a deep blue sky, studded with the stars representing those seen in the Northern Hemisphere. 

This watch has a unique moon-phase display; the orbital moon mimics the path of the evening star and is extremely accurate. Chopard says it will take 122 years to accumulate a one-day time lag compared with the actual moon and only then will it require adjustment. 

A 22K gold micro-rotor helps keep it just 6 mm thick.

The watch is powered by Chopard’s in-house Calibre 96.13-L, one of the few self-winding perpetual calendars that use a micro-rotor. Thanks to the use of a 22-carat gold micro-rotor, this is a really slim perpetual calendar movement. The watch case is only 11.47 thick and the movement is only 6 mm thick, remarkable for one with a perpetual calendar function.

As expected, the movement is finished well and features guilloché-work on the rotor, beveled bridges that are adorned with Geneva stripes, a circular-grained baseplate, mirror-polished steel parts and a regulator with swan neck adjustment. Incidentally, Calibre 96.13-L carries the Poinçon de Genève quality hallmark and its precision is certified by the COSC, the Swiss Official Chronometer Testing Institute.