Young Girl: 七月 2013

The El Primero was slimmer and more accurate than the Chronomatic due to its faster beating movement of 36,000 vph and this cheap watches has helped its longevity. The earliest Reference 6139 chronographs were called "Speed Timers" and had a 30-minute chronograph recorder, with a day-date at three o'clock. The red-blue outer bezel was marked with a tachymeter scale and a rotating inner bezel marked elapsed minutesThe watchmakers were to battle it out for the next ten years until the demise of the Chronomatic due to the appearance of more efficient quartz chronographs. The El Primero didn't suffer the same ending thanks to a watchmaker who shrewdly hid the components and tools needed for its production in an attic and Ainol Novo8 Discover these were used to recreate it once mechanical watches made a comeback. The Seiko 6139 was made until 1978 when Seiko stopped making automatic chronographs until the mid 1990's in favor of quartz models.Top 10 Technically Important Mechanical Wrist Watches watch talkSeiko Spring Drive Mechanical Movement With Quartz RegulationSeiko announced the manual winding version of their ground breaking Spring Drive in 1999 and in 2004 released the Spring Drive self-winding movement. In 2009 on aBlogtoWatch we Car Camera discussed all you wanted to know about Spring Drive.Producing over 600 prototypes during the 28 years it took to develop, the Spring Drive was the result of Seiko's quest to create a mechanical watch with the accuracy of a quartz. Starting in 1977 with its first patent, in total there were no less than touch screen watch 230 patents that have been applied worldwide for this movement.Spring Drive watches use a main spring and barrel like any other mechanical movement, however the mechanical escapement has been replaced by what Seiko calls its "Tri-synchro Regulator". The Tri-synchro Regulator regulates the unwinding of the mainspring and controls the speed of the glide wheel by using electromagnetic braking which corrects its speed to a quartz reference signal.The Spring Drives have a number of advantages over watches with standard escapements. They are highly accurate: Seiko claims one second a day, however owners have been finding them even more accurate than that. Increased Music Angel accuracy is not only due to the electronic regulation but also because there is no mechanical escapement they are unaffected by positional variance and gravity - the position you leave your watch in will not affect its accuracy.They also have a 72 hour power reserve which is a 30% gain over regular mechanical movements and feature a "gliding" seconds hand which aesthetically also appeals to a lot of people. They are also arguably more durable since there are less stresses involved with the whole sale on watches Tri-synchro Regulator compared to a traditional escapement.The Spring drive is a ground breaking, 21st century mechanical watch - defined by Seiko as an electronically controlled mechanical timepiece - that gives you the best of both worlds, the charm and beauty of a mechanical watch but with the accuracy of a quartz timepiece. 745TDBanty 130723

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