ETA 2820 – interchangeable spare parts
ETA 2820 movement
Which spare parts fit the ETA 2820 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.
🛒 Spare parts for ETA 2820 in our shop
🔧 Interchangeable parts
Source: original interchangeability lists of ETA (checked transcription) and checked original spare-part labels · as of 2026-10-28. Height / execution: the part fits only in this height or execution.
🌀 Matching mainspring
Mainspring dimensions for ETA 2820 (height × diameter × thickness × length) and matching mainspring in our shop:
🔗 Movements sharing the most parts
- ETA 2822 (58 parts)
- ETA 2821 (57 parts)
- ETA 2800 (53 parts)
- ETA 2828 (48 parts)
- ETA 2824 (46 parts)
- ETA 2826 (45 parts)
- ETA 2802 (42 parts)
- ETA 2830 (41 parts)
- ETA 2832 (41 parts)
- ETA 2801 (41 parts)
- ETA 2821-1 (38 parts)
- ETA 2824-1 (38 parts)
- ETA 2821-2 (36 parts)
- ETA 2824-2 (36 parts)
- ETA 2834 (36 parts)
- ETA 2836 (36 parts)
❓ Frequently asked questions
Which ETA 2820 spare parts also fit other movements?
For the ETA 2820, 42 part numbers are listed as interchangeable. Together they fit 176 other calibers – the table below shows which part fits which movement.
Which movements share the most parts with the ETA 2820?
The most shared parts: ETA 2822 (58 parts), ETA 2821 (57 parts), ETA 2800 (53 parts).
Which mainspring fits the ETA 2820?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.25 × 12.0 × 0.10 × 500 mm (GR 3120-X, automatic, with welded slipping bridle).
Can I buy spare parts for the ETA 2820?
Yes, Master Watch Parts currently has 1 matching items in stock.
🛠️ For the workshop
Clock Key 2-4-6-8-10, Star Key for Large Clocks and Wall Clocks, Brass – New8,49 € incl. VAT *View item ›
Watch Gasket Hytrel I-Ring Seal for Flat Round Mineral Crystals 16-40 mm, H: 0.6, 0.8, 0.85, 1.25, 1.7 mm5,95 € – 9,95 € incl. VAT *View item ›
Red Teflon Hard Gasket For Watch Caseback Multi Size Listing Ø 16-42. Suitable for many brand watches such as Omega, Tissot, Junghans5,95 € – 7,95 € incl. VAT *View item ›