FEF 6681 – interchangeable spare parts

FEF 6681 movement

Which spare parts fit the FEF 6681 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

28Parts with interchange data

24Calibers 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 401 FEF 6680 FEF 6686 FEF 6687
195ISO 20.060	Barrel arbor	FEF 400 FEF 401 FEF 6680 FEF 6686 FEF 6687
206ISO 30.015	Center wheel	FEF 6680 FEF 6686 FEF 6687
210ISO 30.025	Third wheel	FEF 6680 FEF 6686 FEF 6687
227ISO 30.027	Sweep second wheel	FEF 6680 Height 585 FEF 6680 Height 635 FEF 6680 FEF 6686 FEF 6687
245ISO 31.080	Cannon pinion with clam notch	FEF 6680 Height 205 FEF 6680 Height 230 FEF 6680 Height 255 FEF 6680 FEF 6686 FEF 6687 Height 280 FEF 6680 FEF 6686 FEF 6687
255ISO 31.046	Hour wheel	Height 125 FEF 400 FEF 401 FEF 6680 Height 150 FEF 400 FEF 401 FEF 6680 Height 175 FEF 400 FEF 401 FEF 6680 Height 200 FEF 400 FEF 401 FEF 6680
260ISO 31.041	Minute wheel	FEF 400 FEF 401 FEF 6680 FEF 6686 FEF 6687
307ISO 40.301	Regulator with adjustable stud holder, for flat hairspring	FEF 6687
311ISO 70.800	Upper cap jewel with end-piece	FEF 6670 FEF 6676 FEF 6677 FEF 6680 FEF 6686 FEF 6687 FEF 6870 FEF 6876
330ISO 70.801	Lower cap jewel with end-piece	FEF 6670 FEF 6676 FEF 6677 FEF 6680 FEF 6686 FEF 6687 FEF 6870 FEF 6876
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	FEF 6680 FEF 6686 FEF 6687
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	FEF 6680 FEF 6686 FEF 6687
401ISO 51.010	Winding stem	ETA 1301 FEF 400 FEF 401 FEF 6680 FEF 6686 FEF 6687
407ISO 31.121	Clutch wheel	FEF 6687
410ISO 31.120	Winding pinion	FEF 6687
415ISO 31.020	Ratchet wheel	FEF 400 FEF 401 FEF 6680 FEF 6686 FEF 6687
420ISO 31.023	Crown wheel	FEF 6664 FEF 6665 FEF 6687 FEF 6764 FEF 6765
422ISO 81.067	Crown wheel ring	FEF 6664 FEF 6665 FEF 6670 FEF 6676 FEF 6677 FEF 6687 FEF 6764 FEF 6765 FEF 6870 FEF 6876
434ISO 51.120	Clicking spring	FEF 6632 FEF 6633 FEF 6687
435ISO 51.050	Yoke	FEF 6687
443ISO 51.080	Setting lever	FEF 400 FEF 401 FEF 6680 FEF 6686 FEF 6687
443/5443ISO 51.080.06/.01	Setting lever	FEF 400 FEF 401 FEF 6680 FEF 6686 FEF 6687
445ISO 51.090	Setting lever spring	FEF 6687
450ISO 31.100	Setting wheel	FEF 6687
702ISO 30.040.12	Escape wheel and pinion, pivoted, for two end-pieces	FEF 6680 FEF 6686 FEF 6687
705ISO 30.040	Escape wheel and pinion	FEF 6680 FEF 6686 FEF 6687
710ISO 40.010	Jewelled pallet fork and stat	FEF 270 2e FEF 6680 FEF 6686 FEF 6687 1st execution FEF 270 2e FEF 1270 FEF 6680 FEF 6686 FEF 6687 2nd execution FEF 270 2e FEF 370 FEF 371N FEF 372 FEF 373 FEF 400 FEF 401 FEF 6680 FEF 6686 FEF 6687 3rd execution FEF 270 2e FEF 371 FEF 372 FEF 373 FEF 6680 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 6681 online:

FEF 6681-6687 – Ø 19.40 mm

🔗 Movements sharing the most parts

→ All calibers of FEF

❓ Frequently asked questions

Which FEF 6681 spare parts also fit other movements?

For the FEF 6681, 28 part numbers are listed as interchangeable. Together they fit 24 other calibers – the table below shows which part fits which movement.