FHF 821 – interchangeable spare parts

FHF 821 movement

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

30Parts with interchange data

88Calibers 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 821-4
195ISO 20.060	Barrel arbor	FHF 82 FHF 82-4 FHF 821-4 2nd execution FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
201ISO 30.015	Center wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
210ISO 30.025	Third wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
224ISO 30.027.13	Fourth wheel	FHF 82 Height 395 FHF 82 Height 450 FHF 82 FHF 82-4 FHF 821-4
240ISO 31.080	Cannon-pinion	FHF 81 FHF 82 FHF 811 Height 231 FHF 81 FHF 82 FHF 811 Height 256 FHF 81 FHF 82 FHF 811 Height 286 FHF 81 FHF 82 FHF 811 Height 316 FHF 81 FHF 82 FHF 811
250ISO 31.046	Hour wheel	FHF 81 FHF 82 FHF 811 Height 117 FHF 81 FHF 82 FHF 811 Height 142 FHF 81 FHF 82 FHF 811 Height 172 FHF 81 FHF 82 FHF 811 Height 202 FHF 81 FHF 82 FHF 811
260ISO 31.041	Minute wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
307ISO 40.301	Regulator with adjustable stud holder, for flat hairspring	FHF 82 FHF 82-4 FHF 821-4
311ISO 70.800	Upper cap jewel with end-piece	FHF 82 FHF 82-4 FHF 821-4
330ISO 70.801	Lower cap jewel with end-piece	FHF 82 FHF 82-4 FHF 821-4
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 821-4
346ISO 70.807	Lower cap jewel with end-piece, f. esc. wheel	FHF 82 FHF 82-4 FHF 821-4
401ISO 51.010	Winding stem	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
407ISO 31.121	Clutch wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
410ISO 31.120	Winding pinion	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
415ISO 31.020	Ratchet wheel	FHF 82 FHF 82-4 FHF 821-4 2nd execution FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
420ISO 31.023	Crown wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
423ISO 81.136	Crown wheel core	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
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 821-4 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 821-4 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 821-4
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 821-4
443ISO 51.080	Setting lever	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
443/5443ISO 51.080.06/.01	Setting lever	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
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 821-4
450ISO 31.100	Setting wheel	FHF 81 FHF 81-2 FHF 82 FHF 82-4 FHF 811 FHF 811-2 FHF 821-4
702ISO 30.040.12	Escape wheel and pinion, pivoted, for two end-pieces	FHF 82 FHF 82-4 FHF 821-4
705ISO 30.040	Escape wheel and pinion	FHF 82 FHF 82-4 FHF 821-4
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 821-4 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 821-4

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 (height × diameter × thickness × length) and matching mainspring in our shop:

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

📄 Technical document

View the original document for FHF 821 online:

FHF 82-821

🔗 Movements sharing the most parts

→ All calibers of FHF

❓ Frequently asked questions

Which FHF 821 spare parts also fit other movements?

For the FHF 821, 30 part numbers are listed as interchangeable. Together they fit 88 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the FHF 821?

The most shared parts: FHF 82 (43 parts), FHF 81 (32 parts), FHF 811 (32 parts).

Which mainspring fits the FHF 821?

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).