Unitas 177 – interchangeable spare parts

Unitas (UT) 177 movement

Which spare parts fit the Unitas 177 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

1Parts with interchange data

38Calibers 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
445	Setting lever spring	according to original label Unitas 175 Unitas 176 Unitas 228 Unitas 376 Unitas 500 Unitas 600 Unitas 610 Unitas 620 Unitas 640 Unitas 650 Unitas 6300 Unitas 6300N Unitas 6303 Unitas 6305 Unitas 6305N Unitas 6310 Unitas 6310N Unitas 6312 Unitas 6312N Unitas 6340 Unitas 6340N Unitas 6342 Unitas 6342N Unitas 6343 Unitas 6343N Unitas 6410 Unitas 6410N Unitas 6411 Unitas 6412 Unitas 6412N Unitas 6415 Unitas 6415N Unitas 6450 Unitas 6450N Unitas 6452 Unitas 6452N Unitas 6460 Unitas 6460N

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

Unitas 176 à 179: 1.75 × 11.5 × 0.135 × 340 mm (GR 5170)

🔗 Movements sharing the most parts

→ All calibers of Unitas (UT)

❓ Frequently asked questions

Which Unitas 177 spare parts also fit other movements?

For the Unitas 177, 1 part numbers are listed as interchangeable. Together they fit 38 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the Unitas 177?

The most shared parts: Unitas 175 (1 parts), Unitas 176 (1 parts), Unitas 228 (1 parts).

Which mainspring fits the Unitas 177?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.75 × 11.5 × 0.135 × 340 mm (GR 5170, hand-wound, normal end hook).