FEF 401 – interchangeable spare parts

FEF 401 movement

Which spare parts fit the FEF 401 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

30Parts with interchange data

42Calibers 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
182ISO 20.030	Barrel and cover	FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687
195ISO 20.060	Barrel arbor	FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687
206ISO 30.015	Center wheel	FEF 400
210ISO 30.025	Third wheel	FEF 400
227ISO 30.027	Sweep second wheel	FEF 400 Height 560 FEF 400 Height 585 FEF 400 Height 610 FEF 400
245ISO 31.080	Cannon pinion with clam notch	FEF 400 Height 180 FEF 400 Height 205 FEF 400 Height 230 FEF 400 Height 255 FEF 400 Height 280 FEF 400
255ISO 31.046	Hour wheel	FEF 400 Height 100 FEF 400 Height 125 FEF 400 FEF 6680 FEF 6681 Height 150 FEF 400 FEF 6680 FEF 6681 Height 175 FEF 400 FEF 6680 FEF 6681 Height 200 FEF 400 FEF 6680 FEF 6681
260ISO 31.041	Minute wheel	FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687
311ISO 70.800	Upper cap jewel with end-piece	FEF 86 FEF 130 FEF 133 FEF 170 FEF 250 FEF 270 FEF 370 FEF 371 FEF 400 FEF 1270
330ISO 70.801	Lower cap jewel with end-piece	FEF 400
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	FEF 400
343ISO 70.891	Bearing plate, for sweep second wheel	FEF 400 FEF 6680 FEF 6686
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	FEF 190 FEF 210 FEF 250 FEF 290 FEF 310 FEF 400
401ISO 51.010	Winding stem	ETA 1301 FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687
407ISO 31.121	Clutch wheel	ETA 1301 FEF 400 FEF 6680 FEF 6686
410ISO 31.120	Winding pinion	FEF 400 FEF 6680 FEF 6686
415ISO 31.020	Ratchet wheel	FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687
420ISO 31.023	Crown wheel	FEF 370 FEF 371 FEF 371N FEF 372 FEF 373 FEF 400 FEF 6660 FEF 6662 FEF 6680 FEF 6686
423ISO 81.136	Crown wheel core	FEF 370 FEF 371 FEF 371N FEF 372 FEF 373 FEF 400 FEF 6660 FEF 6662 FEF 6680 FEF 6686
425ISO 51.120	Click	FEF 270 FEF 370 FEF 371 FEF 371N FEF 372 FEF 373 FEF 400 FEF 430 FEF 1270 FEF 6600 FEF 6620 FEF 6621 FEF 6630 FEF 6631 FEF 6650 FEF 6660 FEF 6662 FEF 6664 FEF 6665 FEF 6680 FEF 6686 FEF 6700 FEF 6701 FEF 6710 FEF 6711 FEF 6764 FEF 6765
430ISO 61.080	Click spring	FEF 165 FEF 166 FEF 270 FEF 370 FEF 371 FEF 371N FEF 372 FEF 373 FEF 400 FEF 430 FEF 1270 FEF 6600 FEF 6620 FEF 6621 FEF 6630 FEF 6631 FEF 6640 FEF 6650 FEF 6660 FEF 6662 FEF 6664 FEF 6665 FEF 6680 FEF 6686 FEF 6700 FEF 6701 FEF 6710 FEF 6711 FEF 6764 FEF 6765
435ISO 51.050	Yoke	FEF 400 FEF 6680 FEF 6686
440ISO 61.100	Yoke spring	FEF 400 FEF 6680 FEF 6686
443ISO 51.080	Setting lever	FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687
443/5443ISO 51.080.06/.01	Setting lever	FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687
445ISO 51.090	Setting lever spring	FEF 400 FEF 6680 FEF 6686
450ISO 31.100	Setting wheel	FEF 400 FEF 6680 FEF 6686
702ISO 30.040.12	Escape wheel and pinion, pivoted, for two end-pieces	FEF 400
705ISO 30.040	Escape wheel and pinion	FEF 400
710ISO 40.010	Jewelled pallet fork and stat	2nd execution FEF 270 2e FEF 370 FEF 371N FEF 372 FEF 373 FEF 400 FEF 6680 FEF 6681 FEF 6686 FEF 6687

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 401 online:

FEF 400-401

🔗 Movements sharing the most parts

→ All calibers of FEF

❓ Frequently asked questions

Which FEF 401 spare parts also fit other movements?

For the FEF 401, 30 part numbers are listed as interchangeable. Together they fit 42 other calibers – the table below shows which part fits which movement.