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FEF 6665 – interchangeable spare parts
FEF 6665 movement
Which spare parts fit the FEF 6665 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.
30Parts with interchange data
57Calibers sharing parts
Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of FEF 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.
🛒 Spare parts for FEF 6665 in our shop
🔧 Interchangeable parts
| Part no. | Description | Also fits |
|---|---|---|
| 182ISO 20.030 | Barrel and cover | |
| 195ISO 20.060 | Barrel arbor | |
| 201ISO 30.015 | Center wheel | |
| 210ISO 30.025 | Third wheel | |
| 240ISO 31.080 | Cannon-pinion | Height 195 Height 210 Height 245 Height 270 |
| 250ISO 31.046 | Hour wheel | Height 106 Height 121 Height 156 Height 181 |
| 260ISO 31.041 | Minute wheel | |
| 307ISO 40.301 | Regulator with adjustable stud holder, for flat hairspring | |
| 311ISO 70.800 | Upper cap jewel with end-piece | |
| 330ISO 70.801 | Lower cap jewel with end-piece | |
| 336ISO 70.806 | Upper cap-jewel with end-piece, for escape wheel | |
| 346ISO 70.807 | Lower cap jewel with end-piece, f. esc. wheel | |
| 401ISO 51.010 | Winding stem | |
| 407ISO 31.121 | Clutch wheel | |
| 410ISO 31.120 | Winding pinion | |
| 415ISO 31.020 | Ratchet wheel | |
| 420ISO 31.023 | Crown wheel | |
| 422ISO 81.067 | Crown wheel ring | |
| 425ISO 51.120 | Click | |
| 430ISO 61.080 | Click spring | |
| 435ISO 51.050 | Yoke | |
| 440ISO 61.100 | Yoke spring | |
| 443/1ISO 51.080.06 | Setting lever, assembled | |
| 445ISO 51.090 | Setting lever spring | according to original label |
| 450ISO 31.100 | Setting wheel | |
| 705ISO 30.040 | Escape wheel and pinion | |
| 710ISO 40.010 | Jewelled pallet fork and stat | |
| 2558 | Double-toothing hour wheel | |
| 2575ISO 63.030 M 6 | Date jumper spring | |
| 2576ISO 53.080 M 6 | Date jumper, mounted |
Source: original interchangeability lists of FEF (checked transcription) and checked original spare-part labels · as of 2026-10-17. Height / execution: the part fits only in this height or execution.