The Vallée de Joux watch brand shows how multi-talented it is – a.k.a. Métiers Rares® – on the dial and heart of its iconic Master Ultra Thin. Four different types of handmade skill adorn four timepieces each limited to 100 pieces: skeletonised manual wind 849ASQ calibre, engraved mother-of-pearl or enamelling on the hour rim, gem-set bezel surrounding the 38mm white or rose gold. The movement bringing the leaf-shape hour and minute hands has been delicately openworked and sculpted to create a real mechanical spectacle that you can see both front and back; it also provides a 33-hour power reserve. Depending on the model, the hour rim features a mother-of-pearl strip carved out with a wavy pattern or a layer of enamel under the indices: intense, almost Klein, blue paired with white gold or red-tinged brown cradled by warm rose gold. Price: 57,500 CHF (enamel on rose gold) – 73,500 CHF (mother-of-pearl on diamond white gold)