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The concentration of the technology cultivated during a long history of Rolex!
I ran in early the chronograph model "Cosmo graph Daytona" from the end of 1950s to 1960s, and a chronograph called popular name "pre-Daytona" with a chronograph of Rolex before Daytona existed. I put Cal.72B which improved Cal .72 made in Baru Jewish race company on ムーブメンント, and the model of the black clockface can hardly see you above all.
About 1961 began, and Ref .6239 came up. I become the longed-for model that this does not consider, the first model of Daytona. That there was a little waterproofness as for this model because a push button was not a screw was 30M. Therefore a dial does not have a letter of "OYSTER", and Daytona to the second generation is called "a non-oyster".
In Daytona that came up in fourth generation and 1988 to be, it is the model that everybody knows well afterwards after having passed through the third generation. It was equipped with Cal .4030 that improved the self-winding watch movement "L primero" for the chronograph of Zenith Corporation and became the birth of the Rolex's first self-winding watch chronograph. The shelter belt became hard to be damaged with sapphire crystal specifications, and it was a big characteristic that waterproofness improved the Lew's to 100M and double by adoption of トリプロック.
And Daytona that served as a model change in fifth generation and 2000 to be becomes this model. Although there is few it, as for the big change by the design, what I put Rolex's first self-developed self-winding watch chronograph movement, Cal .4130 on becomes the topics. A power reservation is largely postponed from 52 hours till 72 hours, and what was equipped with in this way features the hack function more.
Generally, I often play an eternal calendar, but point to the deployment model of self-winding watch mechanism equipped with all rotary rotors in the case of Rolex or this mechanism.
[with the chronometer authorization]
It is the authorization that Swiss public institution, association of chronometer official approval in Switzerland (COSC: Controle Officiel Suisse des Chronometres) give the movement that passed a severe precision test.
As the proof, a letter of "CHRONOMETER OFFICIALLY CERTIFIED" is designed "CHRONOMETER" by a clockface.
The test is carried out at Geneva, le ロックル or an experiment station of Vienne. In the test item, the precision of the movement is inspected in five posture differences (position) and three difference of temperature for 15 days.
I receive chronometer authorization and only the movement that I was able to pass is listed in a clockface with a chronometer and is shipped.
I do not use the electronics such as the electricity at all, and the technique to start all these precision by low vibration to be born from a spring and metal exercise will be the skill that the history of the machine clock for several hundred years can do.
||Case diameter: 39mm (Lew's is excluded)
||A case: 18K yellow gold / stainless steel
A belt: 18K yellow gold / stainless steel
||Self-winding watch /Cal.4130/ chronometer / power reservation [up to 72 hours]
||Exclusive BOX international warranty our store warranty
||Our store two years guarantee
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