rolexのインスタグラム(rolex) - 11月19日 03時00分

Calibre 4130’s architecture incorporates fewer components than a standard chronograph, thereby enhancing the movement’s reliability. It also saves space, making it possible to house a large mainspring and delivers a power reserve of 72 hours. The chronograph is engaged by a mechanism with a column wheel and vertical clutch – instead of a lateral one. This enables an instantaneous and extremely precise start to the timing, as well as the smooth running of the chronograph seconds hand for long periods of time.
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