Felsa 21 – interchangeable spare parts

Felsa 21 movement

Which spare parts fit the Felsa 21 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

31Parts with interchange data

22Calibers 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
182ISO 20.030	Barrel and cover	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
195ISO 20.060	Barrel arbor	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
201ISO 30.015	Center wheel	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
210ISO 30.025	Third wheel	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
220ISO 30.027	Fourth wheel	Felsa 21N Felsa 26 Felsa 28 Felsa 81
240ISO 31.080	Cannon-pinion	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 187 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 220 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 257 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 290 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 480 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 740 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
250ISO 31.046	Hour wheel	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 100 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 133 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 170 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 205 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 393 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82 Height 653 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
260ISO 31.041	Minute wheel	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 81 Felsa 82
301ISO 40.301	Regulator for flat hairspring	1st execution Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 81 Felsa 82 2nd execution Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29
307ISO 40.301	Regulator with adjustable stud holder, for flat hairspring	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29
311ISO 70.800	Upper cap jewel with end-piece	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
330ISO 70.801	Lower cap jewel with end-piece	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29
334/1ISO 70.860	Upper cap jewels with end-pieces, for three wheels	Felsa 21N Felsa 22 Felsa 22N Felsa 28 Felsa 29
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	1st execution Felsa 22 Felsa 81 Felsa 82 Felsa 302 Felsa 350 Felsa 351 Felsa 352 2nd execution Felsa 21N Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 372 Felsa 372N Felsa 373 Felsa 373N 2nd execution Felsa 350 Felsa 351 Felsa 352 2nd execution Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 233 Felsa 290 Felsa 291 Felsa 302 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 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29
401ISO 51.010	Winding stem	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
407ISO 31.121	Clutch wheel	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
410ISO 31.120	Winding pinion	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
415ISO 31.020	Ratchet wheel	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
420ISO 31.023	Crown wheel	Felsa 22 Felsa 81 Felsa 82 1st execution Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
425ISO 51.120	Click	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82
430ISO 61.080	Click spring	Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 81 Felsa 82
435ISO 51.050	Yoke	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
440ISO 61.100	Yoke spring	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
443ISO 51.080	Setting lever	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
443/5443ISO 51.080.06/.01	Setting lever	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
445ISO 51.090	Setting lever spring	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
450ISO 31.100	Setting wheel	Felsa 21N Felsa 22 Felsa 22N Felsa 81 Felsa 82
702ISO 30.040.12	Escape wheel and pinion, pivoted, for two end-pieces	1st execution Felsa 26 Felsa 81 2nd execution Felsa 21N Felsa 28
704ISO 30.040.10	Escape wheel and pinion, for upper end-piece	Felsa 21N Felsa 26 Felsa 28 Felsa 81
710ISO 40.010	Jewelled pallet fork and stat	1st execution Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 28 Felsa 29 Felsa 81 Felsa 82

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

Felsa 21: 1.35 × 5.5 × 0.06 × 160 mm (GR 3460)

📄 Technical document

View the original document for Felsa 21 online:

Felsa 21-22 – Ø 13.50 mm

🔗 Movements sharing the most parts

→ All calibers of Felsa

❓ Frequently asked questions

Which Felsa 21 spare parts also fit other movements?

For the Felsa 21, 31 part numbers are listed as interchangeable. Together they fit 22 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Felsa 21?

The most shared parts: Felsa 21N (45 parts), Felsa 22 (43 parts), Felsa 22N (42 parts).

Which mainspring fits the Felsa 21?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.35 × 5.5 × 0.06 × 160 mm (GR 3460, hand-wound, normal end hook).

Felsa 21 – interchangeable spare parts

🔧 Interchangeable parts

🌀 Matching mainspring

📄 Technical document

🔗 Movements sharing the most parts

❓ Frequently asked questions

Which Felsa 21 spare parts also fit other movements?

Which movements share the most parts with the Felsa 21?

Which mainspring fits the Felsa 21?

🛠️ For the workshop

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