![]() The oscillating pinion, which comprises a mobile stem and two pinions, allows the chronograph to function very efficiently by replacing the two large wheels of the anterior movements. Nephrite is slightly softer that jadeite and is often veined. The gears under the dial that transfer the rotation of the cannon pinion to the hour wheel.Ī family of the jade group of ornamental gemstones. Lange & Söhne displays for the first the the Large Date in the. Kunzite has a hardness of 6-7 and a specific gravity of 3.1 -.Ī date function with large numerals on two independent discs, displayed through oversized apertures. ![]() The colour of some kunzite can be enhanced by irradiation. Nephrite, the more ancient.Ī transparent pink or light purple gemstone and is a variety of spodumene. Jadeite is the variety that ranges in colour from green to white to lilac to brown to almost black. Jade is a gem group with jadeite and nephrite as the two varieties. Heliotrope is used as watch dials.ĭiamonds that have been exposed to radiation in order to change their colour from yellowish to fancy yellow or blue. It is a variety of chalcedony that is dark green with red specks. In a watch, the case but also the movement's plate and bridges can be gilded. To cover an object with a thin layer of gold, generally by electroplating. Unlike other diamonds, carbonadoes are not found in a crystallized form - they are found in irregular.ĭescribes a watch that simultaneously gives the time in two time zones, usually local and the wearer's home.Ī term formerly used in Geneva to describe all the different professions involved in watchmaking. The mainspring is hooked to the barrel at its.Ĭarbonardo is a rare type of opaque black diamond used for drilling bits and abrasive wheels. The barrel, which contains the mainspring, turns freely on its arbor. It was the subject of the Exposition internationale des arts décoratifs et industriels modernes (International.Ī cylindrical box (the barrel) and toothed disc (wheel), protected by a cover. An artistic movement that began circa 1910 and continued until 1930.
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