Felsa 28 – interchangeable spare parts

Felsa 28 movement

Which spare parts fit the Felsa 28 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

25Parts with interchange data

19Calibers 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 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
195ISO 20.060	Barrel arbor	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
201ISO 30.015	Center wheel	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
210ISO 30.025	Third wheel	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
220ISO 30.027	Fourth wheel	Felsa 21 Felsa 21N Felsa 26 Felsa 81
240ISO 31.080	Cannon-pinion	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 187 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 220 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 257 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 290 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 480 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 740 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
250ISO 31.046	Hour wheel	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 100 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 133 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 170 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 205 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 393 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82 Height 653 Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
260ISO 31.041	Minute wheel	Felsa 29
301ISO 40.301	Regulator for flat hairspring	Felsa 29 2nd execution Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29
307ISO 40.301	Regulator with adjustable stud holder, for flat hairspring	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29
311ISO 70.800	Upper cap jewel with end-piece	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
330ISO 70.801	Lower cap jewel with end-piece	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29
334/1ISO 70.860	Upper cap jewels with end-pieces, for three wheels	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 29
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	Felsa 21 2e Felsa 21N Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 372 Felsa 372N Felsa 373 Felsa 373N 2nd execution Felsa 21 Felsa 21 2e Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 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 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29
406ISO 51.010	Winding and hand-setting stem for vertical winding mechanism	Felsa 29
415ISO 31.020	Ratchet wheel	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
420/1ISO 31.023.06	Crown wheel, mounted	Felsa 29
425ISO 51.120	Click	Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 Felsa 29 Felsa 81 Felsa 82
430ISO 61.080	Click spring	Felsa 29
450ISO 31.100	Setting wheel	Felsa 29
450/2ISO 31.100	Setting wheel with toothed opening for winding stem with leaves	Felsa 29
702ISO 30.040.12	Escape wheel and pinion, pivoted, for two end-pieces	Felsa 21 2e Felsa 21N
704ISO 30.040.10	Escape wheel and pinion, for upper end-piece	Felsa 21 Felsa 21N Felsa 26 Felsa 81
710ISO 40.010	Jewelled pallet fork and stat	1st execution Felsa 21 Felsa 21N Felsa 22 Felsa 22N Felsa 26 Felsa 27 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 28 (height × diameter × thickness × length) and matching mainspring in our shop:

Felsa 26 à 29: 1.35 × 5.5 × 0.06 × 160 mm (GR 3460)

📄 Technical document

View the original document for Felsa 28 online:

Felsa 28-29 – Ø 13.50 mm

🔗 Movements sharing the most parts

→ All calibers of Felsa

❓ Frequently asked questions

Which Felsa 28 spare parts also fit other movements?

For the Felsa 28, 25 part numbers are listed as interchangeable. Together they fit 19 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Felsa 28?

The most shared parts: Felsa 29 (36 parts), Felsa 21 (33 parts), Felsa 21N (32 parts).

Which mainspring fits the Felsa 28?

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).