The ETA 902.002 is a compact and reliable quartz movement developed by Switzerland’s ETA, primarily designed for slim, minimalist wristwatches. Below is its core information:
Basic Attributes: Classified as an analog-display quartz movement, it is powered by a Renata R321 (321/SR616SW) button cell battery. Under normal usage, the battery life can reach up to 120 months (about 10 years)—a standout feature for long-term, low-maintenance use.
Dimension Specifications: It has a diameter of approximately 13 x 15.15 mm and a core thickness of 2.4 mm, consistent with the slim profile of the ETA 901 series. This compact size makes it ideal for ultra-thin watch cases, especially small or delicate styles.
Height Configurations: Similar to its sibling models, it offers multiple overall height options to match different case requirements, typically including specifications like 3.20 mm (HCP 0), 3.38 mm (standard), and 3.92 mm (HCP 3)—flexible for diverse watch design needs.
Functional Features: Adopts a 2-hand (hour, minute) design (no second hand), focusing on simplicity and slimness. It omits extra functions to prioritize the movement’s thin profile, suitable for minimalist or formal watches that value understated aesthetics.
Internal Configuration: Equipped with 3 synthetic jewel bearings (usually ruby). These bearings reduce friction between internal moving parts, ensuring stable operation and maintaining basic precision for long-term use.
Application Scope: With its ultra-long battery life and slim size, it is widely used in women’s delicate watches, men’s ultra-thin minimalist timepieces, or casual watches that emphasize low maintenance. It is also a common replacement option for aging compact quartz movements in mid-range watch models.
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