F.P. Journe Chronomètre Souverain Nacre Ref. CS Boutique Platinum Blue Mother of Pearl Dial

Blue shell in a platinum case is the cooler of the two Nacre dials, and the pair were the only time mother of pearl has appeared on this model. They were boutique pieces from 2012, made in numbers small enough that most collectors have never handled one in the metal. The material behaves differently from every other dial Journe makes, since it moves rather than reflects. Journe has never gone back to it on this reference.

The platinum case measures 40 mm across. The center of the dial is whitened guilloché silver, ringed by an outer band of blue mother of pearl, so the two halves of the face catch light on entirely different terms. The small seconds register sits low, where it always does. Shell against platinum is a colder reading than the rose gold version, and the harder of the two to find on the open market today.