Felsa 4520 – interchangeable spare parts

Felsa 4520 movement

Which spare parts fit the Felsa 4520 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

4Parts with interchange data

0Calibers 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 4520 in our shop

Hands Set 100-50, 3.50/5.0mm ETA 2440 2442 210.001 959.001 FELSA 4520 AS 9627,95 € – 19,85 € incl. VAT *View item ›

Balance Wheel without Hairspring for FELSA 4520 – Part 721 – Incabloc8,90 € incl. VAT *View item ›

Escape Wheel and Pinion with Straight Pivots for FELSA 4520 – Part 705 C12,90 € – 14,90 € incl. VAT *View item ›

🔧 Interchangeable parts

Part no.	Description	Also fits
210	Third wheel	according to original label – confirmed for this calibre only
248	Cannon pinion driving wheel	according to original label – confirmed for this calibre only
250	Hour wheel	Height 85according to original label – confirmed for this calibre only
443/5443	Setting lever	according to original label – confirmed for this calibre only

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

❓ Frequently asked questions

Which Felsa 4520 spare parts also fit other movements?

For the Felsa 4520, 4 part numbers are listed as interchangeable. Together they fit 0 other calibers – the table below shows which part fits which movement.