ETA 1121 – interchangeable spare parts

ETA 1121 movement

Which spare parts fit the ETA 1121 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

3Parts with interchange data

9Calibers 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
401	Winding stem	Height 90according to original label ETA 1100 ETA 1101 ETA 1114 ETA 1120 ETA 1162 ETA 1164 ETA 1168 ETA 1292 ETA 1293
410	Winding pinion	according to original label ETA 1100 ETA 1101 ETA 1120 ETA 1168 ETA 1292 ETA 1293
445	Setting lever jumper	according to original label ETA 1120 ETA 1162 ETA 1164 ETA 1292 ETA 1293

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 1121 (height × diameter × thickness × length) and matching mainspring in our shop:

ETA 1113 à 1133: 1.50 × 10.5 × 0.13 × 320 mm (GR 4196)

🔗 Movements sharing the most parts

→ All calibers of ETA

❓ Frequently asked questions

Which ETA 1121 spare parts also fit other movements?

For the ETA 1121, 3 part numbers are listed as interchangeable. Together they fit 9 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the ETA 1121?

The most shared parts: ETA 1120 (3 parts), ETA 1292 (3 parts), ETA 1293 (3 parts).

Which mainspring fits the ETA 1121?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.50 × 10.5 × 0.13 × 320 mm (GR 4196, hand-wound, normal end hook).