ETA 1009

The ETA 1009 represents a manual-winding mechanical movement produced by ETA, a prominent Swiss manufacturer of watch movements. This caliber is designed to provide reliable timekeeping through traditional horological mechanics, requiring direct interaction from the wearer to maintain its operation. Central to the ETA 1009's construction are its 17 jewels. These synthetic rubies are strategically placed at points of high friction within the movement, serving as durable, low-friction bearings for critical components like the balance staff and gear train pivots. This design choice minimizes wear and tear on metal parts, contributing to the movement's longevity and consistent performance over time. The movement operates at a frequency of 18,000 vibrations per hour (vph), which translates to 2.5 Hertz (Hz). This rate means the balance wheel completes 2.5 oscillations every second. For the wearer, this frequency results in a seconds hand that advances in five distinct steps per second, offering a visible, steady sweep across the dial. While not the highest frequency available, 18,000 vph is a well-established rate known for its robustness and ease of service. The ETA 1009 provides a power reserve of 41 hours. This specification indicates that once the mainspring is fully wound, the movement can continue to operate for just over a day and a half without requiring further winding. Practically, this allows the wearer to remove the watch for a full day, for instance, and still find it running the following morning. However, for optimal timekeeping stability, daily winding is generally recommended. In terms of physical dimensions, the ETA 1009 has a diameter of 23.7 mm and a height of 4.8 mm. These measurements classify it as a relatively compact caliber. Its modest diameter and height mean that watches housing this movement can be designed with smaller or thinner cases, appealing to individuals who prefer a more understated or less bulky presence on the wrist. In summary, the ETA 1009 is a manual-wind movement characterized by its 17-jewel construction, a frequency of 18,000 vph, and a 41-hour power reserve. Its compact dimensions allow for versatile application in watch designs that prioritize a smaller or slimmer profile. For the wearer, it offers the traditional engagement of a hand-wound watch, coupled with the practical benefit of a sufficient power reserve and a design conducive to comfortable wear.

Specifications

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