FEF 250 – interchangeable spare parts

FEF 250 movement

Which spare parts fit the FEF 250 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

15Parts with interchange data

27Calibers 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.

🔧 Interchangeable parts

Part no.	Description	Also fits
255ISO 31.046	Hour wheel	2nd execution FEF 6764 FEF 6765
301ISO 40.301	Regulator for flat hairspring	FEF 400
311ISO 70.800	Upper cap jewel with end-piece	FEF 86 FEF 130 FEF 133 FEF 170 FEF 270 FEF 370 FEF 371 FEF 400 FEF 401 FEF 1270
330ISO 70.801	Lower cap jewel with end-piece	FEF 86 FEF 130 FEF 133 FEF 150 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310 FEF 350 FEF 380 FEF 380-2
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	1st execution FEF 86 FEF 130 3e FEF 133 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310 FEF 380-2 2nd execution FEF 150 FEF 270 FEF 370 FEF 371 FEF 371N FEF 372 FEF 373 FEF 430 FEF 1270 FEF 6650
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	FEF 190 FEF 210 FEF 290 FEF 310 FEF 400 FEF 401
401ISO 51.010	Winding stem	1st execution FEF 86 FEF 170 2nd execution FEF 86 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310
410ISO 31.120	Winding pinion	FEF 86 FEF 170
420ISO 31.023	Crown wheel	FEF 86 FEF 130 FEF 133 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310
423ISO 81.136	Crown wheel core	FEF 86 FEF 130 FEF 133 FEF 170 FEF 190 FEF 210
425ISO 51.120	Click	FEF 86 FEF 130 2e FEF 133 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310
430ISO 61.080	Click spring	FEF 86 FEF 130 FEF 133 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310 FEF 350 2e FEF 380 FEF 380-2
443ISO 51.080	Setting lever	FEF 86 FEF 130 FEF 133 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310
443/5443ISO 51.080.06/.01	Setting lever	FEF 86 FEF 170 FEF 190 FEF 210 FEF 290 FEF 310
710ISO 40.010	Jewelled pallet fork and stat	Felsa 800 Peseux 250

Source: original interchangeability lists of FEF (checked transcription) and checked original spare-part labels · as of 2026-10-28. Height / execution: the part fits only in this height or execution.

📄 Technical document

View the original document for FEF 250 online:

FEF 250 – Ø 19.40 mm, height 3.65 mm

🔗 Movements sharing the most parts

→ All calibers of FEF

❓ Frequently asked questions

Which FEF 250 spare parts also fit other movements?

For the FEF 250, 15 part numbers are listed as interchangeable. Together they fit 27 other calibers – the table below shows which part fits which movement.