Felsa 302 – interchangeable spare parts

Felsa 302 movement

Which spare parts fit the Felsa 302 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

6Parts with interchange data

40Calibers 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
311ISO 70.800	Upper cap jewel with end-piece	Felsa 350 Felsa 351 Felsa 352 Felsa 720 Felsa 720N Felsa 721 Felsa 722 Felsa 780 Felsa 780N Felsa 781 Felsa 781N Felsa 782 Felsa 782N Felsa 800 Felsa 4057 Felsa 4058
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	1st execution Felsa 21 Felsa 22 Felsa 81 Felsa 82 Felsa 350 Felsa 351 Felsa 352 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 370 Felsa 372 Felsa 372N Felsa 373 Felsa 373N Felsa 382
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	Felsa 780 Felsa 780N Felsa 781 Felsa 781N Felsa 782 Felsa 782N Felsa 4057
425ISO 51.120	Click	Felsa 233 2e Felsa 290 Felsa 291 Felsa 372 Felsa 372N Felsa 373 Felsa 373N
445	Setting lever spring	according to original label Felsa 324
710ISO 40.010	Jewelled pallet fork and stat	AV 41 Unitas 510 Unitas 520 Unitas 521

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

Felsa 302: 1.45 × 7.5 × 0.08 × 240 mm (GR 3922)

🔗 Movements sharing the most parts

→ All calibers of Felsa

❓ Frequently asked questions

Which Felsa 302 spare parts also fit other movements?

For the Felsa 302, 6 part numbers are listed as interchangeable. Together they fit 40 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Felsa 302?

The most shared parts: Felsa 21 (3 parts), Felsa 350 (2 parts), Felsa 351 (2 parts).

Which mainspring fits the Felsa 302?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.45 × 7.5 × 0.08 × 240 mm (GR 3922, hand-wound, normal end hook).