Rolex Caliber 4130

The Rolex Caliber 4130, also known as the 4130 or Cal. Rolex Caliber 4130, is an automatic movement developed and manufactured by Rolex. This caliber integrates a suite of timekeeping and timing functions, designed to provide both standard time display and precise measurement of elapsed time. At its core, the Caliber 4130 is an automatic movement, meaning it self-winds through the natural motion of the wearer's wrist. This eliminates the need for manual winding when worn regularly, offering convenience for daily use. The movement incorporates 44 jewels, which serve to reduce friction at critical pivot points within the gear train. This reduction in friction contributes to the movement's longevity and helps maintain consistent performance over time. Operating at a frequency of 28,800 vibrations per hour (vph), or 4 Hz, the Caliber 4130 allows for a smooth sweep of the seconds hand, which is characteristic of movements with this oscillation rate. This frequency also contributes to the movement's ability to maintain accuracy. Beyond its fundamental timekeeping capabilities, which include displaying hours, minutes, and a small seconds indication, the Caliber 4130 is equipped with a comprehensive chronograph complication. This function allows the wearer to measure intervals of time, effectively acting as a stopwatch. The chronograph is complemented by two specific counters: a 30-minute counter and a 12-hour counter. The 30-minute counter enables the measurement of elapsed time up to half an hour, useful for shorter timing tasks. For longer events, the 12-hour counter provides the capability to track elapsed time over a period of up to twelve hours. These counters work in conjunction with the central chronograph seconds hand to provide a full range of timing possibilities. A significant practical advantage for the wearer is the movement's 72-hour power reserve. When fully wound, the Caliber 4130 can continue to operate for three days without being worn or manually wound. This extended power reserve means the watch can be taken off for a weekend and still be running when picked up again on Monday, without the need to reset the time. The combination of automatic winding, a robust jewel count, a stable operating frequency, and a substantial power reserve, alongside its integrated chronograph functions, defines the operational profile of the Rolex Caliber 4130.

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