The ETA F03.115 is a compact, high-efficiency quartz movement belonging to ETA’s F03 series—known for its slim profile, long battery life, and suitability for minimalist watch designs. Below is its core information based on official specifications and industry application data:
Basic Attributes: Classified as an analog-display quartz movement, it is powered by a Renata R379 (379/SR521SW) button cell battery (a common compact battery model for small movements). Under normal daily use, the battery life can reach up to 24 months, ensuring low maintenance for daily wear.
Dimension Specifications: It follows the F03 series’ “ultra-compact” design philosophy, with a diameter of approximately 11.5 mm and a core thickness of only 1.9 mm. This ultra-slim, small footprint makes it ideal for ultra-thin watch cases and delicate styles—especially suitable for women’s small-sized watches, minimalist unisex timepieces, or even some jewelry watches that require minimal internal space.
Functional Features: Focuses on core timekeeping with a 2-hand (hour, minute) design (no second hand), prioritizing slimness by omitting non-essential components. It does not include additional functions like date display, which aligns with its positioning for simple, sleek watch aesthetics.
Internal Configuration: Equipped with 2 synthetic jewel bearings (typically ruby), strategically placed at key friction points (e.g., gear axles). These bearings reduce wear between moving parts, ensuring stable operation and maintaining standard quartz precision—with a typical daily error within +/- 15 seconds, meeting daily use requirements.
Application Scope: Due to its ultra-compact size and slim thickness, the F03.115 is widely used in women’s delicate watches (e.g., small round or oval styles), minimalist ultra-thin casual watches, and entry-to-mid-range fashion timepieces that prioritize lightweight and sleek design. It is also a common replacement option for aging compact quartz movements in small-sized watch models.
Note: For exact parameters (e.g., specific height configurations, minor structural adjustments), refer to ETA’s official technical manuals or authorized supplier documentation.
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