Expert weapon how to watch master Ni Siwen watch collection of watches _ watch _ auction _ fashio

watch identification master Ni Siwen weapon: how to

collection of watches

stunt watch repair master

in Shanghai there is a famous watch repair evaluation master, said any watches are good or bad he just a pinch of a mold on the know, and as the only Shanghai watches Certified Expert, the relevant judicial departments involved in the case of the clock must pass through his identification, the target has been more than 5000 Watch by him. In fact, a long time, collection of watches has become the market a hot topic, has also become the object of concern to many investors. Then, the mysterious mechanic what trick, he will tell us which of the secret


watch identification master Ni Siwen weapon: how to

collection of watches< p > Ni Siwen since 1975, began to Hengdali clocks shop watch repair and maintenance work, relying on own diligently,, honor will ensue, watch repair industry a resounding name. In 1995, Ni Siwen finally got the title of senior technicians,, and in second years was included in the Huangpu District senior technicians in the directory, and the country in this industry to obtain the senior technicians, the title of a handful of people.

< p > after the reform and opening up, he was entrusted with the task,, in October 1979, single handedly up at the time of the first imported watches repair shop?? citizen special maintenance center, become in China after the reform and opening up the first foreign employed by technical and after-sales service management personnel. At the end of 1995 he in Hengdali clocks within the company established "Ni Siwen watch repair studio, specializing in the world watches maintenance, maintenance of antique clocks, gold shell repair and other characteristics of the project,, to fill the time gaps in the watch repair. And now, he set up a studio in the East pawn, but also allows people to understand the entire process of the repair table through the glass window.

The gold watch on the map [decryption component] _ _ watch watch small knowledge _ fashion watch _ P

Rolex oyster Series Gold strap machine’s

< p > history, many of the alchemists, have tried to through some means to make synthetic gold cheaper to obtain profits, therefore has accumulated gold to add the different elements of different texture and color effect of experience.

< p > and standard of 18K gold, the color slightly red 18K pink gold, pink gold) has a different title red gold, red gold, rose gold, rose gold), and because it was in the early 19th century popular in Russia and the name of Russia (Russian gold. The composition is generally 750 thousand pure gold and 250 thousand of electrolytic copper, with strong ductility, high hardness, not easy to deformation or scrape injury and color changeable characteristics. The latter is especially benefited from the change in the composition of the alloy if added to the silver, the color will be lighter, the more the more silver, the more light red. When the content of silver increased to 10%, copper content back to about 15%,, the color will be relatively light or partial powder. Now, people have become accustomed to define chromaticity changes 3N gold powder (component for 75% pure gold and 13% silver and 12% copper), 4N gold powder (component for 75% pure gold plus 9% silver and 16% copper), 5N gold powder (component for 75% gold and 4.5% silver and 20.5% copper) with different numbers. It can be seen that the addition of silver and copper more, the color is also more and more partial red.


SERPENTI series of quartz watch,, 18kt rose gold case,, inlaid round brilliant diamonds.

addition, the most likely to cause people to misunderstand is 18K platinum. Although the color is generally difficult to distinguish from stainless steel, platinum,, etc., but it is still a kind of 18K gold, but its composition has a slightly different. The gold proportion is 750 per thousand, the other 250 1000 metal, it is often the secret. Vacheron Constantin changed the platinum formula for its men’s watches in 2007. More common platinum component is 75% pure gold and palladium copper 6% and 4% silver and nickel 2.5% 12.5%, then plated with rhodium metal protection, but Vacheron Constantin PD ratio increased to 15%, the expensive action the platinum rhodium plating without can more shiny, the factory also pointed out that this kind of formula will increase its strength, is not easy to be damaged. In fact, with 18K platinum, 18K gold is also prone to fade phenomenon, so Patek Philippe and Rolex in recent years are propaganda their 18K powder gold formula special, is the so-called "eternal" not fade of new material, in fact, only experts can tell their color and the difference.

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