The ETA 2789-1 is a vintage automatic mechanical watch movement produced by ETA, renowned for its reliability in mid-20th-century timepieces. Developed around 1949, it pioneered a ball-bearing rotor in gents’ automatics and powered brands like Rado, Certina, and Edox.
Key Specifications
Size: 11.5 lignes (25.6 mm diameter, 5.9 mm height)
Jewels: 25 (some variants with 17 or 21)
Frequency: 21,600 vph (3 Hz)
Power Reserve: Approximately 38-47 hours
Functions: Hours, minutes, sweeping seconds, day-date at 3:00 with quickset
Notable Features
This self-winding caliber supports manual winding and bidirectional rotor action. It includes Incabloc shock protection and variants with T- or U-shock systems, plus multilingual day displays. Production spanned the late 1960s to early 1980s, evolving into the ETA 2824 family.
Historical Context
As part of ETA’s 2700/2800 series, the 2789-1 featured innovations like a stem release button for easy servicing. Variants (e.g., TC, UT, UC) arose from modifications, making it a staple in affordable Swiss watches. Today, it’s prized by collectors for repairs and NOS parts availability.
For any Watch Spare Parts inquiry, Email us for rate and availability: [email protected]
Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
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