ETA 2377 – interchangeable spare parts

ETA 2377 movement

Which spare parts fit the ETA 2377 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

6Parts with interchange data

4Calibers 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 240according to original label ETA 2370 ETA 2375
401	Winding stem	Height 90according to original label ETA 2370 ETA 2373 ETA 2375 ETA 2378
435	Yoke	according to original label ETA 2370 ETA 2373 ETA 2375 ETA 2378
443	Setting lever	according to original label ETA 2370 ETA 2373 ETA 2375 ETA 2378
445	Setting lever jumper	according to original label ETA 2370 ETA 2373 ETA 2375 ETA 2378
703C	Escape wheel and pinion, for lower end-piece	according to original label ETA 2370 ETA 2373 ETA 2375 ETA 2378

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 2377 (height × diameter × thickness × length) and matching mainspring in our shop:

ETA 2375 à 2381 Aut: 1.50 × 11.0 × 0.11 × 400 mm (GR 4154-X)

🔗 Movements sharing the most parts

→ All calibers of ETA

❓ Frequently asked questions

Which ETA 2377 spare parts also fit other movements?

For the ETA 2377, 6 part numbers are listed as interchangeable. Together they fit 4 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the ETA 2377?

The most shared parts: ETA 2370 (6 parts), ETA 2375 (6 parts), ETA 2373 (5 parts).

Which mainspring fits the ETA 2377?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.50 × 11.0 × 0.11 × 400 mm (GR 4154-X, automatic, with welded slipping bridle).