Becker 120 – interchangeable spare parts

Becker 120 movement

Which spare parts fit the Becker 120 movement? For every part you can see which other calibers use the same part according to the original Becker spare-part labels. We do not have an original interchangeability list from the manufacturer.

1Parts with interchange data

11Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original Becker spare-part labels; we do not have an original interchangeability list from the manufacturer. 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
710	Jewelled pallet fork and staff	Becker 80 Becker 81 Becker 82 Becker 82E Becker 110 Becker 111 Becker 112 Becker 113 Becker 115 Becker 116 Becker 118

Source: checked original Becker spare-part labels · as of 2026-10-18. Height / execution: the part fits only in this height or execution.

🌀 Matching mainspring

Mainspring dimensions for Becker 120 (height × diameter × thickness × length) and matching mainspring in our shop:

Becker 115 à 120: 1.40 × 10.0 × 0.125 × 320 mm (GR 3740)

🔗 Movements sharing the most parts

→ All calibers of Becker

❓ Frequently asked questions

Which Becker 120 spare parts also fit other movements?

For the Becker 120, 1 part numbers are listed as interchangeable. Together they fit 11 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Becker 120?

The most shared parts: Becker 80 (1 parts), Becker 81 (1 parts), Becker 82 (1 parts).

Which mainspring fits the Becker 120?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.40 × 10.0 × 0.125 × 320 mm (GR 3740, hand-wound, normal end hook).