Wrist Watch: SINN Sailing Chronograph 903&Nbsp; Classic

　　 SINN The 300 limited watches introduced in 2009, using the 1883 movement that Lemania no longer supplied, integrated many functions such as speedometer, timing, phase, calendar and so on. The shockproof and antimagnetic performance reached the DIN 8308 and DIN8309 standards respectively. The polished stainless steel watch shell and the waterproof depth were 100 meters.

As one of the weapons of human conquest, modern clocks occupied an indispensable position in the navigation industry. Europeans spent hundreds of years and countless resources. Until the middle of eighteenth Century, they finally invented marine clocks that could effectively combat vibration and temperature difference. Speaking of the nautical clock, the British John Harrison is definitely an unneglecting character. The village watchmaker went through all his life to create a sailing clock that was widely used for later generations. It can not only measure longitude accurately, but also resist vibration. Temperature difference 。 In 1757, Harrison completed the H3, which is the third generation of modified bell made by him. H3 contains several new inventions. Harrison replaced the original dumbbell balancer with a circular balancer, which solved the problem of centrifugal force. He made a "Bimetallic Strip" instead of the "grill" originally used to resist temperature changes. This metal sheet is still widely used in thermostat. He also invented a ball bearing with clip rings, which can still be found on machines with moving parts. Bearing 。

The British Navy ordered a large number of sailing clocks for use by warships. Because of the low price, each ship can be equipped with several marine clocks. When the British Royal Navy's "little Beagle" set sail in 1831, it carried 22 sailing clocks along with the ship. Darwin began to conceive the origin of species by taking the "little Beagle" around the world. In 2009, the universal watch had launched a "Gila Pargo J islands" chronograph. Its design inspiration was originated from Darwin's Gila Pargo J islands, which was originally arrived at the origin of the species. It was composed of 19 volcanic islands. Although this watch did not really relate to the elements related to the sea, the design of sulfurized coating as the watchcase and the large sea turtle reliefs carved on the surface of the table were enough to feel the outward appearance of being far away from the noise.

Historically, before Harrison made the nautical bell, sailors used to use the sun and moon to locate them. They instinctively did not believe that a metal box could take the place of the universe and God. To them, a clock and a magic box in the hands of a magician are mysterious and incomprehensible, so they can not be trusted. But when more and more navigators began to perform heroic deeds in the global sea with the help of the sea clock, the nautical clock became an indispensable navigational instrument for the Voyager. Another major event affecting the history of navigation took place in 1884. The international meridian line was adopted as the meridian of the Greenfield Observatory in the outskirts of London, England. The eastern meridian is 180 degrees east, and the west is 180 degrees west. Because the earth is a circular sphere, the meridian of 180 degrees east and the West meridian coincide 180 degrees into a longitude line. Therefore, all countries also recognize that the 180 degree longitude is the international date line, and when the land is encountered, the international date line will be offset, so as to avoid using two different dates in the same area. After the longitude is established, the navigator only needs to observe the time at the noon of the sun on the sea, so that the longitude at present can be converted.

Although the early navigational clock must be tested by the observatory, its appearance is various, and the various shapes and operation methods have caused a lot of trouble to the crew. The pragmatism idea introduced by Athens and other brands provides a reference for the highly standardized design of the marine clock. Guerra Souty, Longines, Hamilton and others have provided a large number of watches and clocks for the military in history. They also began to make marine clocks based on unified design standards. In the delicate wooden boxes, two symmetrical pendulum pendulums were used to offset the impact of ship sway on timing accuracy. In 2008, the design concept of the old sailing clock was integrated into the watch by real force. The challenge of the four surprise was the most shockproof mechanism owned by the nautical watch. This kind of creative inspiration similar to the "universal joint" actually came from the original design principle of the clock.