ETA 2728 – interchangeable spare parts
ETA 2728 movement
Which spare parts fit the ETA 2728 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.
🔧 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 2728 (height × diameter × thickness × length) and matching mainspring in our shop:
🔗 Movements sharing the most parts
- ETA 2738 (66 parts)
- ETA 2630 (62 parts)
- ETA 2724 (60 parts)
- ETA 2724R (56 parts)
- ETA 2722 (53 parts)
- ETA 2734 (50 parts)
- ETA 2722R (49 parts)
- ETA 2734R (46 parts)
- ETA 2632 (45 parts)
- ETA 2732 (44 parts)
- ETA 2638 (44 parts)
- ETA 2638R (43 parts)
- ETA 2639 (41 parts)
- ETA 2639R (41 parts)
- ETA 2622 (37 parts)
- ETA 2732R (36 parts)
❓ Frequently asked questions
Which ETA 2728 spare parts also fit other movements?
For the ETA 2728, 54 part numbers are listed as interchangeable. Together they fit 145 other calibers – the table below shows which part fits which movement.
Which movements share the most parts with the ETA 2728?
The most shared parts: ETA 2738 (66 parts), ETA 2630 (62 parts), ETA 2724 (60 parts).
Which mainspring fits the ETA 2728?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.25 × 11.0 × 0.135 × 400 mm (GR 3150-X, automatic, with welded slipping bridle).
🛠️ For the workshop
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Swiss Luminova DIY Kit, Luminous Powder for Watch Hands, C1 C3 C5 Yellow Orange19,95 € – 59,90 € incl. VAT *View item ›
Replacement Sapphire Watch Crystal, Flat, 1.0 mm, Ø 15 - 45 mm22,40 € – 34,90 € incl. VAT *View item ›