ETA 2503 – interchangeable spare parts
ETA 2503 movement
Which spare parts fit the ETA 2503 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 2503 (height × diameter × thickness × length) and matching mainspring in our shop:
🔗 Movements sharing the most parts
- ETA 2502 (68 parts)
- ETA 2516 (64 parts)
- ETA 2500 (59 parts)
- ETA 2522 (56 parts)
- ETA 2522R (55 parts)
- ETA 2532 (52 parts)
- ETA 2532R (52 parts)
- ETA 2520 (49 parts)
- ETA 2520R (49 parts)
- ETA 2538 (36 parts)
- ETA 2538R (36 parts)
- ETA 2539 (36 parts)
- ETA 2539R (36 parts)
- ETA 2600 (19 parts)
- ETA 2602 (19 parts)
- ETA 2612 (18 parts)
❓ Frequently asked questions
Which ETA 2503 spare parts also fit other movements?
For the ETA 2503, 39 part numbers are listed as interchangeable. Together they fit 144 other calibers – the table below shows which part fits which movement.
Which movements share the most parts with the ETA 2503?
The most shared parts: ETA 2502 (68 parts), ETA 2516 (64 parts), ETA 2500 (59 parts).
Which mainspring fits the ETA 2503?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.20 × 11.0 × 0.12 × 380 mm (GR 2976, hand-wound, normal end hook).
🛠️ For the workshop
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Watch Key Clock Winding Key – Size 0 2.25mm5,99 € – 7,95 € 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 ›