Watch Mainspring 771 – Fits ETA 2824-2, 2836-2, 2834-2
Watch Mainspring 771 – Fits ETA 2824-2, 2836-2, 2834-2
Watch Mainspring Movement Replacement Part – 771 Compatible
Keep your automatic timepiece running with precision using this high-quality mainspring movement replacement part. Designed to fit popular ETA calibres including the 2824-2, 2836-2, and 2834-2, this 771-series mainspring is an essential component for watchmakers and hobbyists performing movement servicing and restoration work.
Product Specifications
- Material: Metal (Zinc Alloy)
- Color: Silver
- Size: 1.8 cm / 0.7 in (approx.)
- Compatible Movements: ETA 2824-2, ETA 2836-2, ETA 2834-2
- Condition: 100% Brand New
- Package Contents: 1 × Mainspring (771 series)
- Made in Mainland China
Why Choose This Mainspring?
- ✔ Direct-fit replacement for ETA 2824/2836/2834 family movements
- ✔ Precision-crafted metal construction for consistent torque delivery
- ✔ Compact and lightweight – easy to handle during bench work
- ✔ Ideal for watch repair technicians and enthusiasts servicing Swiss-style automatic calibres
- ✔ Affordable single-piece option – stock up without overspending
Please Note
- Actual size may differ slightly from photos – always refer to the listed dimensions.
- Allow ±5–10 mm tolerance due to manual measurement.
- Colors may appear slightly different on various monitors due to lighting and screen calibration.
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Frequently Asked Questions
Q: Which watch movements is this mainspring compatible with?
A: This 771-series mainspring replacement is designed to fit ETA calibre movements 2824-2, 2836-2, and 2834-2 — some of the most widely used Swiss-style automatic movements in the industry.
Q: What is the mainspring made of?
A: The mainspring is constructed from metal (zinc alloy), providing durability and consistent energy storage for reliable movement performance.
Q: How many mainsprings are included in the package?
A: Each order includes 1 piece (1 × 771 mainspring). If you need multiple units, simply adjust the quantity at checkout.
Q: Is this suitable for beginner watch repair hobbyists?
A: Yes — while mainspring replacement does require basic watchmaking tools and some experience with movement servicing, this part is a standard component suitable for both professional watchmakers and dedicated hobbyists working on ETA-based movements.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.