The ETA 2671 is a compact automatic mechanical watch movement renowned for its reliability in ladies’ and smaller unisex timepieces. Introduced in 1971 by ETA, part of the Swatch Group, it belongs to the 2600 family and powers numerous Swiss-made watches with precise timekeeping and a date function.
Key Specifications
Size and Height: 7 3/4 lignes (17.2 mm diameter), 4.80 mm thick, ideal for slim cases.
Jewels: Typically 25 (some variants 17-21), reducing friction for longevity.
Frequency: 28,800 beats per hour (A/h), ensuring smooth seconds sweep.
Power Reserve: Approximately 38-44 hours when fully wound.
Functions: Hours, minutes, central seconds, date at 3 o’clock with quickset.
Features and Technology
This self-winding caliber uses bi-directional automatic winding via a central rotor, often gold-plated, with Incabloc shock protection for durability. It features a pallet lever escapement, nickel annular balance, and counterclockwise balance cock, supporting hackable seconds in many versions. Hand sizes fit 1.20/0.70/0.20 mm stems.
Usage and Variants
Common in brands like Longines (as Cal. L561) and Oris (base for Cal. 581), the ETA 2671 excels in dress watches due to its precision and customizability. Part of the 2670/2680 series, it offers instant date change and remains in production for “Swiss Made” reliability.
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
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