Felsa 370 – interchangeable spare parts

Felsa 370 movement

Which spare parts fit the Felsa 370 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

5Parts with interchange data

24Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of Felsa 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
330ISO 70.801	Lower cap jewel with end-piece	Felsa 347 Felsa 700 Felsa 700N Felsa 702 Felsa 705 Felsa 705N
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	1st execution Felsa 233 Felsa 290 Felsa 291 Felsa 382 2nd execution Felsa 21 Felsa 21 2e Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 233 Felsa 290 Felsa 291 Felsa 302 Felsa 372 Felsa 372N Felsa 373 Felsa 373N Felsa 382
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	Felsa 233 Felsa 382
422ISO 81.067	Crown wheel ring	AM 382Felsa 233 Felsa 382
430ISO 61.080	Click spring	AM 382Felsa 233 Felsa 382

Source: original interchangeability lists of Felsa (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 Felsa 370 (height × diameter × thickness × length) and matching mainspring in our shop:

Felsa 370: 1.15 × 6.0 × 0.07 × 200 mm (GR 2770)

🔗 Movements sharing the most parts

→ All calibers of Felsa

❓ Frequently asked questions

Which Felsa 370 spare parts also fit other movements?

For the Felsa 370, 5 part numbers are listed as interchangeable. Together they fit 24 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Felsa 370?

The most shared parts: Felsa 233 (5 parts), Felsa 382 (5 parts), Felsa 21 (2 parts).

Which mainspring fits the Felsa 370?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.15 × 6.0 × 0.07 × 200 mm (GR 2770, hand-wound, normal end hook).