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Felsa 125 – interchangeable spare parts
Felsa 125 movement
Which spare parts fit the Felsa 125 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.
24Parts with interchange data
1Calibers 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 |
|---|---|---|
| 181ISO 20.040 | Barrel for drilled core | AM 125 |
| 197ISO 20.070.06 | Core and ratchet wheel, riveted | AM 125 |
| 201ISO 30.015 | Center wheel | AM 125 |
| 210ISO 30.025 | Third wheel | AM 125 |
| 224ISO 30.027.13 | Fourth wheel | AM 125 |
| 240ISO 31.080 | Cannon-pinion | Height 305 AM 125 Height 350 AM 125 Height 390 AM 125 |
| 250ISO 31.046 | Hour wheel | Height 190 AM 125 Height 235 AM 125 Height 275 AM 125 |
| 260ISO 31.041 | Minute wheel | AM 125 |
| 301ISO 40.301 | Regulator for flat hairspring | AM 125 |
| 311ISO 70.800 | Upper cap jewel with end-piece | AM 125 |
| 330ISO 70.801 | Lower cap jewel with end-piece | AM 125 |
| 401ISO 51.010 | Winding stem | AM 125 |
| 411ISO 31.120 | Winding pinion | AM 125 |
| 421ISO 31.025 | Lower crown wheel | AM 125 |
| 434ISO 51.120 | Clicking spring | AM 125 |
| 437ISO 51.052 | Rocking bar | AM 125 |
| 439ISO 61.101 | Rocking bar spring | AM 125 |
| 443ISO 51.080 | Setting lever | AM 125 |
| 443/5443ISO 51.080.06/.01 | Setting lever | AM 125 |
| 445ISO 51.090 | Setting lever spring | AM 125 |
| 451ISO 31.102 | Setting wheel for minute wheel | AM 125 |
| 452ISO 31.104 | Ratchet-winding wheel | AM 125 |
| 705ISO 30.040 | Escape wheel and pinion | AM 125 |
| 710ISO 40.010 | Jewelled pallet fork and stat | AM 125 |
Source: original interchangeability lists of Felsa (checked transcription) and checked original spare-part labels · as of 2026-10-17. Height / execution: the part fits only in this height or execution.
🌀 Matching mainspring
Mainspring dimensions for Felsa 125 (height × diameter × thickness × length) and matching mainspring in our shop: