Unitas 245 – interchangeable spare parts

Unitas (UT) 245 movement

Which spare parts fit the Unitas 245 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

2Parts with interchange data

8Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of Unitas (UT) 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
224	Fourth wheel	according to original label Unitas 431 Unitas 445 Unitas 481 Unitas 6431 Unitas 6445
710	Jewelled pallet fork and stat	according to original label Unitas 431 Unitas 432 Unitas 445 Unitas 446 Unitas 481 Unitas 6431 Unitas 6445 Unitas 6481

Source: original interchangeability lists of Unitas (UT) (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 Unitas 245 (height × diameter × thickness × length) and matching mainspring in our shop:

Unitas 245: 1.90 × 16.5 × 0.21 × 520 mm (GR 5676)

🔗 Movements sharing the most parts

→ All calibers of Unitas (UT)

❓ Frequently asked questions

Which Unitas 245 spare parts also fit other movements?

For the Unitas 245, 2 part numbers are listed as interchangeable. Together they fit 8 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Unitas 245?

The most shared parts: Unitas 431 (2 parts), Unitas 445 (2 parts), Unitas 481 (2 parts).

Which mainspring fits the Unitas 245?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.90 × 16.5 × 0.21 × 520 mm (GR 5676, hand-wound, normal end hook).