FHF 120 – interchangeable spare parts

FHF 120 movement

Which spare parts fit the FHF 120 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

3Parts with interchange data

6Calibers 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
425	Click	according to original label FHF 59 FHF 59-21 FHF 59N FHF 123
703ISO 30.040.11	Escape wheel and pinion, for lower end-piece	AV 122 Unitas 190
705ISO 30.040	Escape wheel and pinion	AV 122 Unitas 190

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

FHF 120: 1.35 × 7.0 × 0.08 × 240 mm (GR 3473)

🔗 Movements sharing the most parts

→ All calibers of FHF

❓ Frequently asked questions

Which FHF 120 spare parts also fit other movements?

For the FHF 120, 3 part numbers are listed as interchangeable. Together they fit 6 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the FHF 120?

The most shared parts: FHF 59 (1 parts), FHF 59-21 (1 parts), FHF 59N (1 parts).

Which mainspring fits the FHF 120?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.35 × 7.0 × 0.08 × 240 mm (GR 3473, hand-wound, normal end hook).