Felsa 721 – interchangeable spare parts

Felsa 721 movement

Which spare parts fit the Felsa 721 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

32Parts 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 Felsa 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.

🛒 Spare parts for Felsa 721 in our shop

Balance Wheel with Hairspring for FELSA 4002, Part 721, Incabloc – NOSBalance Wheel with Hairspring for FELSA 4002, Part 721, Incabloc – NOSView itemBalance with Hairspring for FELSA 4062 and 4072 – Part 721 – IncablocBalance with Hairspring for FELSA 4062 and 4072 – Part 721 – Incabloc13,99 € incl. VAT *View itemBalance Wheel without Hairspring for FELSA 4520 – Part 721 – IncablocBalance Wheel without Hairspring for FELSA 4520 – Part 721 – Incabloc8,90 € incl. VAT *View item

🔧 Interchangeable parts

Part no.DescriptionAlso fits
182ISO 20.030Barrel and cover
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
195ISO 20.060Barrel arbor
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
201ISO 30.015Center wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
210ISO 30.025Third wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
224ISO 30.027.13Fourth wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
240ISO 31.080Cannon-pinion
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 212
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 232
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 252
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 282
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 342
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 760
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
250ISO 31.046Hour wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 110
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 130
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 150
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 180
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 240
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
Height 658
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
260ISO 31.041Minute wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
301ISO 40.301Regulator for flat hairspring
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
307ISO 40.301Regulator with adjustable stud holder, for flat hairspring
Felsa 720Felsa 720NFelsa 722
311ISO 70.800Upper cap jewel with end-piece
Felsa 302Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722Felsa 780Felsa 780NFelsa 781Felsa 781NFelsa 782Felsa 782NFelsa 800Felsa 4057Felsa 4058
330ISO 70.801Lower cap jewel with end-piece
Felsa 383Felsa 384Felsa 415Felsa 690Felsa 692Felsa 692NFelsa 693Felsa 694Felsa 695Felsa 699Felsa 720Felsa 720NFelsa 722Felsa 760Felsa 780Felsa 780NFelsa 781Felsa 781NFelsa 782Felsa 782NFelsa 790Felsa 792Felsa 800Felsa 1560Felsa 4000Felsa 4000NFelsa 4002Felsa 4004Felsa 4005Felsa 4005NFelsa 4006NFelsa 4007Felsa 4007NFelsa 4008Felsa 4009Felsa 4010Felsa 4010NFelsa 4012Felsa 4014Felsa 4015Felsa 4015NFelsa 4017Felsa 4017NFelsa 4018Felsa 4019Felsa 4045Felsa 4057
336ISO 70.806Upper cap-jewel with end-piece, for escape wheel
Felsa 720Felsa 720NFelsa 722Felsa 780Felsa 780NFelsa 781Felsa 781NFelsa 782Felsa 782N
346ISO 70.807Lower cap jewel with end-piece, f. esc. wheel
Felsa 372Felsa 372NFelsa 373Felsa 373NFelsa 720Felsa 720NFelsa 722
401ISO 51.010Winding stem
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
407ISO 31.121Clutch wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
410ISO 31.120Winding pinion
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
415ISO 31.020Ratchet wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
420ISO 31.023Crown wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
422ISO 81.067Crown wheel ring
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
425ISO 51.120Click
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
430ISO 61.080Click spring
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
435ISO 51.050Yoke
Felsa 720Felsa 720NFelsa 722
440ISO 61.100Yoke spring
Felsa 720Felsa 720NFelsa 722
443ISO 51.080Setting lever
Felsa 720Felsa 720NFelsa 722
443/5443ISO 51.080.06/.01Setting lever
Felsa 720Felsa 720NFelsa 722
445ISO 51.090Setting lever spring
Felsa 720Felsa 720NFelsa 722
according to original label
Felsa 720Felsa 720NFelsa 722Felsa 726
450ISO 31.100Setting wheel
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
702ISO 30.040.12Escape wheel and pinion, pivoted, for two end-pieces
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
704ISO 30.040.10Escape wheel and pinion, for upper end-piece
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
705ISO 30.040Escape wheel and pinion
Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722
710ISO 40.010Jewelled pallet fork and stat
AS 1051AV 46ETA 1302FEF 270FHF 62FHF 65FHF 65-4FHF 90-4FHF 90-5FHF 90-9FHF 138.001FHF 138.011FHF 138.311FHF 641FHF 641-2FHF 641-2NFHF 642FHF 905FHF 908FHF 909Felsa 350Felsa 351Felsa 352Felsa 720Felsa 720NFelsa 722INT.S 36Peseux 280Unitas 190Unitas 200Unitas 200NUnitas 201Unitas 201NUnitas 580Unitas 630Unitas 6360Unitas 6365Unitas 6365N

Source: original interchangeability lists of Felsa (checked transcription) and checked original spare-part labels · as of 2026-10-17. Height / execution: the part fits only in this height or execution.

🔗 Movements sharing the most parts

→ All calibers of Felsa

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