ETA 2640, 2641, 2648, 2650, 2651, 2000, 2892, 2824, 2512, 2370, 2670, 2846, 2850, 2878, 2678, 2688 & 2620 Mainspring Part No. 770, Swiss Watch.

ETA 2824 MainspringThe ETA 2824 Mainspring Part No. 770 is a genuine Swiss-made replacement mainspring manufactured to original ETA specifications for a wide range of mechanical watch movements. As one of the most critical components inside every mechanical movement, the mainspring stores energy generated during winding and releases it gradually to power the gear train, escapement, and balance assembly. Installing a genuine ETA mainspring helps restore stable power delivery, accurate timekeeping, and reliable long-term movement performance.Manufactured in Switzerland from premium spring steel, the ETA 2824 Mainspring offers exceptional elasticity, consistent torque output, and excellent resistance to fatigue. Every mainspring is produced using strict Swiss manufacturing standards to ensure precise dimensions and dependable compatibility with original ETA calibers.The mainspring is considered a wear component because it is constantly wound and unwound during normal operation. After years of use, it may lose elasticity or even break, causing reduced power reserve, low balance amplitude, poor accuracy, or complete movement failure. Replacing it during a complete overhaul is recommended by professional watchmakers to restore factory performance.The ETA 2824 Mainspring is compatible with numerous ETA movements including ETA 2824, ETA 2892, ETA 2640, ETA 2641, ETA 2648, ETA 2650, ETA 2651, ETA 2670, ETA 2678, ETA 2688, ETA 2620, ETA 2846, ETA 2850, ETA 2878, ETA 2512, ETA 2370, and ETA 2000. This wide compatibility makes Part No. 770 an excellent choice for professional repair workshops servicing multiple ETA movement families.Unlike generic replacement springs, the genuine ETA 2824 Mainspring is manufactured with the correct thickness, width, and strength to match original ETA specifications. This ensures smooth power transmission throughout the power reserve while minimizing unnecessary wear on the movement.Whether you are restoring a vintage Swiss watch, servicing a daily-wear mechanical timepiece, or maintaining workshop inventory, the ETA 2824 Mainspring delivers the quality expected from genuine Swiss movement components. Professional watchmakers rely on original ETA parts because they simplify installation, improve reliability, and preserve the movement’s factory performance.Installing a new mainspring during a complete movement service significantly improves energy efficiency, enhances balance amplitude, and restores the watch’s original power reserve. It is one of the most important replacement components in any professional overhaul.Because genuine ETA parts continue to be trusted throughout the watchmaking industry, the ETA 2824 Mainspring remains the preferred choice for collectors, restoration specialists, independent watchmakers, and authorized service centers seeking dependable Swiss replacement parts that meet original factory standards.Technical SpecificationsBrand: ETAPart Name: MainspringPart Number: 770Material: Spring SteelCountry of Manufacture: SwitzerlandCondition: Genuine Swiss PartCompatible with:ETA 2000ETA 2370ETA 2512ETA 2620ETA 2640ETA 2641ETA 2648ETA 2650ETA 2651ETA 2670ETA 2678ETA 2688ETA 2824ETA 2846ETA 2850ETA 2878ETA 2892FeaturesGenuine ETA Swiss partOriginal Part No. 770Premium spring steelStable torque outputExcellent power reservePrecision Swiss manufacturingLong service lifeFactory specificationsIdeal for professional repairSuitable for vintage restorationWide ETA compatibilityReliable long-term performanceFunctionThe ETA 2824 Mainspring stores and releases energy to drive the entire mechanical movement, providing smooth and consistent power transmission for accurate timekeeping.Function and PurposeDesigned to restore the original power reserve and performance of compatible ETA movements, the ETA 2824 Mainspring ensures stable operation, improved amplitude, and dependable long-term reliability after professional servicing.ConstructionManufactured from premium Swiss spring steel with precise dimensions and controlled elasticity to meet original ETA production standards.UsePerfect for:Professional watch repairComplete movement overhaulVintage watch restorationPreventive maintenanceReplacement of worn mainspringsIndependent watchmaking workshopsCollector restorationsCompatibilityCompatible with:ETA 2000ETA 2370ETA 2512ETA 2620ETA 2640ETA 2641ETA 2648ETA 2650ETA 2651ETA 2670ETA 2678ETA 2688ETA 2824ETA 2846ETA 2850ETA 2878ETA 2892Please verify your movement caliber before ordering.Professional UseRecommended for professional watchmakers, restoration specialists, service centers, collectors, and repair workshops servicing genuine ETA mechanical movements.Build QualityManufactured in Switzerland using premium spring steel and original ETA production standards, ensuring exceptional elasticity, durability, and reliable performance.Long-Term ReliabilityWhen installed during a complete movement service, the ETA 2824 Mainspring restores factory power reserve, maintains consistent torque, and provides years of dependable mechanical performance.Shipping & Delivery�� Phone & WhatsApp: 20 122 323 9604�� Email: [email protected]�� Email: [email protected]�� Website: www.swisswh.com�� Facebook Page: https://www.facebook.com/WatchHouseSparePartsWe offer worldwide shipping via DHL and UPS. All orders are carefully packed and dispatched within 1–2 business days. Delivery typically takes 3–7 business days depending on the destination country and customs procedures.