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The ETA 2671-3025 Main Plate Incabloc is a genuine Swiss-made shock protection component designed for the ETA 2671 automatic movement. As part of the Incabloc anti-shock system, this main plate assembly houses the lower balance jewel setting, protecting the delicate balance staff pivot from impact damage during daily wear or servicing . Its characteristic lyre-shaped spring allows the jewel setting to deflect under shock and return to its original position, preventing breakage of the sensitive balance pivots .
Genuine ETA/Incabloc part – authentic Swiss-made component for the ETA 2671 caliber
Main plate shock protection – houses the lower balance jewel setting (Incabloc system)
Proven Incabloc technology – lyre-shaped spring absorbs shocks and protects balance staff pivots
Essential for balance assembly – provides critical support for the lower balance pivot during installation and operation
Precision-engineered – manufactured to ETA’s original specifications
Part Number: 2671-3025 / 3025
Compatible Movement: ETA 2671 (7.75”’)
Movement Diameter: 17.2 mm
Movement Height: 4.8 mm
Jewels: 25 jewels
Frequency: 28,800 vph (4 Hz)
Power Reserve: ~38 hours
Shock Protection: Incabloc system (main plate side)
Origin: Switzerland (ETA factory part)
Condition: Brand new
Service and overhaul of ETA 2671 movements (commonly used in ladies’ watches)
Balance assembly repair – replacing worn or damaged main plate shock jewels
Shock protection restoration – restoring proper impact protection after balance staff replacement
Professional watchmaking – essential for complete movement servicing
Suitable for professional watchmakers and experienced repair technicians
1. Is this a genuine ETA/Incabloc part?
Yes, this is a genuine ETA/Incabloc factory part (reference 2671-3025), made in Switzerland. Incabloc is the standard shock protection system used in ETA 2671 movements .
2. Which movement is this Incabloc compatible with?
This Incabloc assembly is specifically designed for the ETA 2671 automatic movement, a compact 17.2 mm caliber widely used in ladies’ watches . The ETA 2671 is essentially a smaller version of the ETA 2824-2 .
3. What is the function of the main plate Incabloc?
The main plate Incabloc houses the lower balance jewel setting, providing critical protection for the lower balance staff pivot. During impact, the spring-loaded jewel setting deflects to absorb shock and returns to its original position, preventing damage to the delicate pivot .
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