FHF 821-4 – interchangeable spare parts

FHF 821-4 movement

Which spare parts fit the FHF 821-4 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

35Parts with interchange data

89Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of FHF 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	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
195ISO 20.060	Barrel arbor	FHF 82 FHF 82-4 FHF 821 2nd execution FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
201ISO 30.015	Center wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
210ISO 30.025	Third wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
224ISO 30.027.13	Fourth wheel	Height 450 FHF 82 FHF 82-4 FHF 821
240ISO 31.080	Cannon-pinion	FHF 81-2 FHF 82-4 FHF 811-2 Height 286 FHF 81-2 FHF 82-4 FHF 811-2 Height 311 FHF 81-2 FHF 82-4 FHF 811-2 Height 336 FHF 81-2 FHF 82-4 FHF 811-2
260ISO 31.041	Minute wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
307ISO 40.301	Regulator with adjustable stud holder, for flat hairspring	FHF 82 FHF 82-4 FHF 821
311ISO 70.800	Upper cap jewel with end-piece	FHF 82 FHF 82-4 FHF 821
330ISO 70.801	Lower cap jewel with end-piece	FHF 82 FHF 82-4 FHF 821
336ISO 70.806	Upper cap-jewel with end-piece, for escape wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	FHF 82 FHF 82-4 FHF 821
401ISO 51.010	Winding stem	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
407ISO 31.121	Clutch wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
410ISO 31.120	Winding pinion	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
415ISO 31.020	Ratchet wheel	FHF 82 FHF 82-4 FHF 821 2nd execution FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
420ISO 31.023	Crown wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
423ISO 81.136	Crown wheel core	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
425ISO 51.120	Click	FHF 55 2e FHF 55-2 FHF 55-4 FHF 66 FHF 66-4 FHF 66-4N FHF 66-9 FHF 67 FHF 67-2 FHF 67-2N FHF 67-4 FHF 72 FHF 72-2 FHF 72-2N FHF 72-4 FHF 72-4N FHF 72-6 FHF 72-7 FHF 72-9 FHF 73 FHF 73-2 FHF 73-2N FHF 73-4 FHF 73-4N FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 665 FHF 665-4 FHF 665-4N FHF 665-9 FHF 671 FHF 671-2 FHF 671-2N FHF 675 FHF 675-4 FHF 676 FHF 676-4 FHF 725 FHF 725-4 FHF 725-4N FHF 725-7 FHF 725-9 FHF 729 FHF 729-4N FHF 729-7 FHF 735 FHF 735-4 FHF 735-4N FHF 739 FHF 739-4N FHF 811 FHF 811-2 FHF 821 ST 96 2e
430ISO 61.080	Click spring	FHF 28 FHF 28-2 FHF 28-2N FHF 55 FHF 55-2 FHF 55-4 FHF 66 FHF 66-4 FHF 66-4N FHF 66-9 FHF 67 FHF 67-2 FHF 67-2N FHF 67-4 FHF 70 FHF 70-1 FHF 70-2 FHF 70-2N FHF 71 FHF 71-2 FHF 71-2N FHF 72 FHF 72-2 FHF 72-2N FHF 72-4 FHF 72-4N FHF 72-6 FHF 72-7 FHF 72-9 FHF 73 FHF 73-2 FHF 73-2N FHF 73-4 FHF 73-4N FHF 74 FHF 74-2 FHF 74-4 FHF 74-4N FHF 76 FHF 76-2 FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 281 FHF 281-2 FHF 281-2N FHF 551 FHF 665 FHF 665-4 FHF 665-4N FHF 665-9 FHF 671 FHF 671-2 FHF 671-2N FHF 675 FHF 675-4 FHF 676 FHF 676-4 FHF 701 FHF 701-2 FHF 701-2N FHF 711 FHF 711-2 FHF 711-2N FHF 725 FHF 725-4 FHF 725-4N FHF 725-7 FHF 725-9 FHF 729 FHF 729-4N FHF 729-7 FHF 735 FHF 735-4 FHF 735-4N FHF 739 FHF 739-4N FHF 741 FHF 745 FHF 745-4 FHF 745-4N FHF 761 FHF 761-2 FHF 811 FHF 811-2 FHF 821 ST 96
435ISO 51.050	Yoke	FHF 71 FHF 71-2 FHF 71-2N FHF 76 FHF 76-2 FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 711 FHF 711-2 FHF 711-2N FHF 761 FHF 761-2 FHF 811 FHF 811-2 FHF 821
440ISO 61.100	Yoke spring	FHF 70 FHF 70-1 FHF 70-2 FHF 70-2N FHF 71 FHF 71-2 FHF 71-2N FHF 76 FHF 76-2 FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 701 FHF 701-2 FHF 701-2N FHF 711 FHF 711-2 FHF 711-2N FHF 761 FHF 761-2 FHF 811 FHF 811-2 FHF 821
443ISO 51.080	Setting lever	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
443/5443ISO 51.080.06/.01	Setting lever	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
445ISO 51.090	Setting lever spring	FHF 70 FHF 70-1 FHF 70-2 FHF 70-2N FHF 71 FHF 71-2 FHF 71-2N FHF 76 FHF 76-2 FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 701 FHF 701-2 FHF 701-2N FHF 711 FHF 711-2 FHF 711-2N FHF 761 FHF 761-2 FHF 811 FHF 811-2 FHF 821
450ISO 31.100	Setting wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821
702ISO 30.040.12	Escape wheel and pinion, pivoted, for two end-pieces	FHF 82 FHF 82-4 FHF 821
705ISO 30.040	Escape wheel and pinion	FHF 82 FHF 82-4 FHF 821
710ISO 40.010	Jewelled pallet fork and stat	FHF 66 FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 665 FHF 665-4 FHF 665-4N FHF 665-9 FHF 811 FHF 811-2 FHF 821 1st execution FHF 66 FHF 66-4 FHF 66-4N FHF 66-9 FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 665 FHF 665-4 FHF 665-4N FHF 665-9 FHF 811 FHF 811-2 FHF 821
2535ISO 13.105	Date indicator guard	FHF 82-4
2556/1ISO 33.020.06	Date indicator driving wheel	FHF 82-4
2557/1ISO 91.440	Date indicator, transferred	FHF 81-2 FHF 82-4 FHF 811-2
2558ISO 33.010	Double-toothing hour wheel	FHF 82-4 Height 172 FHF 82-4 Height 197 FHF 82-4 Height 222 FHF 82-4
2575ISO 63.030	Date jumper spring	FHF 28-2N FHF 67-2N FHF 70-2N FHF 71-2N FHF 72-2N FHF 73-2N FHF 74-2 FHF 76-2 FHF 81-2 FHF 82-4 FHF 281-2N FHF 671-2N FHF 701-2N FHF 711-2N FHF 761-2 FHF 811-2 FHF 821-2
2576ISO 53.080	Date jumper, mounted	FHF 81-2 FHF 82-4 FHF 811-2

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

🌀 Matching mainspring

Mainspring dimensions for FHF 821-4 (height × diameter × thickness × length) and matching mainspring in our shop:

FHF 821-4: 1.45 × 9.0 × 0.10 × 320 mm (GR 3954)

📄 Technical document

View the original document for FHF 821-4 online:

FHF 82-4-821-4

🔗 Movements sharing the most parts

→ All calibers of FHF

❓ Frequently asked questions

Which FHF 821-4 spare parts also fit other movements?

For the FHF 821-4, 35 part numbers are listed as interchangeable. Together they fit 89 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the FHF 821-4?

The most shared parts: FHF 82-4 (44 parts), FHF 82 (31 parts), FHF 821 (31 parts).

Which mainspring fits the FHF 821-4?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.45 × 9.0 × 0.10 × 320 mm (GR 3954, hand-wound, normal end hook).