If you're looking for a Christmas gift for someone who already subscribes to Clocks, have a look at our Christmas Gifts for Horologists or our Horological Stocking Fillers pages? There you'll find a variety of gifts that might make the perfect present for the horologist who already has everything. ![]() Or how about buying a subscription as a CHRISTMAS PRESENT for a loved one? It's a gift that gives every month for a whole year! Just go to our Christmas gift subscription page and follow the instructions. And which you can have delivered to your door simply by taking out an annual subscription. ![]() All you need to know about clocks in one handy place. Every month it features articles on horology, including clock collecting, profiles on clockmakers of the past 300 years, clock repair and restoration, clock making, antiquarian horology, horological news,readers letters. Horological treasure trove and perfect Christmas giftĮstablished in 1977, CLOCKS is the world's leading independent horological magazine. What's it worth? Price Guide to Clocks 2014.Christmas Gift Subscription to Clocks magazine.A decoration of undulating lines, like waves, frequently used to embellish superior quality movements.Ī circular component that rotates around an axis and whose function is to transmit power or motion.Ī four-digit indication of the current year that changes automatically at midnight on December 31st.Ī metal applied by electrodeposition (electroplating) to protect iron and steel. Universal Time (UT) is a measurement of time based on the Earth's. Since 1972, a continuation of Greenwich Mean Time (GMT) which is mean solar time at the Greenwich meridian. The only way to distinguish one from the other is by observation of the.Ī system devised and patented by Abraham-Louis Breguet in 1801 to compensate for errors of rate caused by the Earth's gravitational force in upright positions. Synthetic stones are stones that have the same characteristics as the natural gemstone, but are man-made in laboratories. The colourless transparent variety of mono-crystalline quartz. Quartz has the specific property of vibrating at a very high frequency (32 MHz) placed under electric current. Pearl, coral and shell are examples of organic substances used in jewellery.Ī button that commands a function, for example to open a case cover or to start and stop a chronograph. Pearls and cultured pearls are covered with nacre by certain species of oysters and mussels.ĭescribes a substance produced by a living organism. The iridescent substance secreted by molluscs around a foreign object. The tool used to wind the mainspring before inserting it in the barrel. The longitude of a point is calculated as the difference between local time at that point and the time at. Kunzite has a hardness of 6-7 and a specific gravity of 3.1 -.Īngle formed by the meridian of a given point, the centre of the Earth and the meridian. ![]() The colour of some kunzite can be enhanced by irradiation. The movement of a quality watch has between 15 and 21 jewels.Ī transparent pink or light purple gemstone and is a variety of spodumene. The international term for the jewels (rubies) in a watch movement that are used as bearings for pivots to reduce friction. The oscillations of a pendulum or balance are isochronal when their duration is the same regardless of their amplitude. In a watch, the case but also the movement's plate and bridges can be gilded.Ī metal part that strikes gongs causing them to vibrate and produce sound. To cover an object with a thin layer of gold, generally by electroplating. The ability of certain gemstones to transform invisible light (ultra violet light) into visible light. When the piece is moved horizontally or vertically against the tool, the finished effect is guilloché, compared with. It was declared to.Ī style of hand or machine engraving with intersecting wavy or straight lines. The.ĭescribes a number of identical step-cut stones with the same, usually square, shape which will be closely set in adjacent rows.Ī decree of October 5th, 1793, promulgated on November 24th of the same year, introduced the French Revolutionary (or Republican) calendar, based on the decimal system. It was known as a blanc and was finished at the établissage. Until circa 1850, an ébauche comprised only the plate, bridges, fusee and barrel. A system that prevents an insufficiently wound striking mechanism from striking too few hours.Īn unfinished movement sold as such.
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