ETA 7750

The ETA 7750, also known by its aliases 7750, Cal. 7750, and Miyota 4P30, is an automatic movement manufactured by ETA. This caliber serves as a foundational component in a wide array of timepieces, providing robust functionality and consistent performance. This movement operates as an automatic caliber, meaning it is self-winding. The wearer's natural wrist movements power the mainspring, negating the need for manual winding as long as the watch is worn regularly. It incorporates 25 jewels, which are synthetic rubies strategically placed at points of friction within the movement. These jewels reduce wear on metal components, contributing to the movement's longevity and smooth operation. The ETA 7750 beats at a frequency of 28,800 vibrations per hour (vph), equivalent to 4 Hz. This high beat rate contributes to the movement's accuracy and results in a smoother sweep of the seconds hand, which can be observed by the wearer. The ETA 7750 offers a power reserve of 42 hours. This specification indicates that once fully wound, the movement can continue to run for up to 42 hours when not being worn, providing convenience for the wearer who might not wear the watch daily. With a diameter of 30 mm, the movement's size influences the overall dimensions of the watch case it inhabits. Its accuracy is specified at 1 second per day, meaning the watch is expected to deviate by no more than one second over a 24-hour period, offering precise timekeeping for daily use. A technical parameter for watchmakers, the lift angle of the balance wheel is 52°, a detail relevant for calibration and timing adjustments. The movement provides several practical complications for the wearer. It displays hours and minutes, which are the primary indicators of time. A small seconds hand offers a continuous visual confirmation that the watch is running. Additionally, the movement features a date display, indicating the day of the month, and a day display, showing the day of the week. These complications enhance the watch's utility, providing essential calendar information at a glance. The ETA 7750 powers a diverse range of watches, demonstrating its versatility across different brands and case sizes. Examples include the ETA Tissot Couturier Chronograph Automatic 7750 Bracelet (Ref. T035.614.11.051.00) and Rose (Ref. T035.614.36.051.00), both with a 43mm case. It is also found in the 46mm ETA Formex Element Automatic Chronograph Ceramic Bezel / Black / Croco (Ref. 1200.5.

Specifications

Complications

Also Known As

Watches Using This Caliber(253)

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