ETA 2621 – interchangeable spare parts

ETA 2621 movement

Which spare parts fit the ETA 2621 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

1Parts with interchange data

15Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of ETA and the original spare-part labels. All information has been carefully checked but is provided without guarantee. Please verify the interchangeability yourself before fitting, especially the height, diameter and execution of the part.

🔧 Interchangeable parts

Part no.	Description	Also fits
242	Cannon pinion with driving wheel	Height 245according to original label ETA 2500 ETA 2600 ETA 2601 ETA 2602 ETA 2604 ETA 2606 ETA 2620 ETA 2622 ETA 2624 ETA 2626 ETA 2630 ETA 2632 ETA 2634 ETA 2636 ETA 2637

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 2621 (height × diameter × thickness × length) and matching mainspring in our shop:

ETA 2620 à 2623 Aut: 1.20 × 11.0 × 0.125 × 400 mm (GR 2985-X)

🔗 Movements sharing the most parts

→ All calibers of ETA

❓ Frequently asked questions

Which ETA 2621 spare parts also fit other movements?

For the ETA 2621, 1 part numbers are listed as interchangeable. Together they fit 15 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the ETA 2621?

The most shared parts: ETA 2500 (1 parts), ETA 2600 (1 parts), ETA 2601 (1 parts).

Which mainspring fits the ETA 2621?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.20 × 11.0 × 0.125 × 400 mm (GR 2985-X, automatic, with welded slipping bridle).