Unitas 620 – interchangeable spare parts
Unitas (UT) 620 movement
Which spare parts fit the Unitas 620 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.
🔧 Interchangeable parts
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 620 (height × diameter × thickness × length) and matching mainspring in our shop:
🔗 Movements sharing the most parts
- Unitas 600 (44 parts)
- Unitas 176 (40 parts)
- Unitas 6310 (32 parts)
- Unitas 6312 (31 parts)
- Unitas 6311 (30 parts)
- Unitas 376 (29 parts)
- Unitas 6310N (28 parts)
- Unitas 6312N (28 parts)
- Unitas 6330 (27 parts)
- Unitas 640 (27 parts)
- Unitas 6311N (27 parts)
- Unitas 6320 (26 parts)
- Unitas 6325 (23 parts)
- Unitas 6326 (23 parts)
- Unitas 6340 (22 parts)
- Unitas 6342 (22 parts)
❓ Frequently asked questions
Which Unitas 620 spare parts also fit other movements?
For the Unitas 620, 26 part numbers are listed as interchangeable. Together they fit 73 other calibers – the table below shows which part fits which movement.
Which movements share the most parts with the Unitas 620?
The most shared parts: Unitas 600 (44 parts), Unitas 176 (40 parts), Unitas 6310 (32 parts).
Which mainspring fits the Unitas 620?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.75 × 12.0 × 0.135 × 420 mm (GR 5174, hand-wound, normal end hook).
🛠️ For the workshop
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Watch Gasket Hytrel I-Ring Seal for Flat Round Mineral Crystals 16-40 mm, H: 0.6, 0.8, 0.85, 1.25, 1.7 mm5,95 € – 9,95 € incl. VAT *View item ›
Red Teflon Hard Gasket For Watch Caseback Multi Size Listing Ø 16-42. Suitable for many brand watches such as Omega, Tissot, Junghans5,95 € – 7,95 € incl. VAT *View item ›