Unitas 650 – interchangeable spare parts
Unitas (UT) 650 movement
Which spare parts fit the Unitas 650 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 650 (height × diameter × thickness × length) and matching mainspring in our shop:
🔗 Movements sharing the most parts
- Unitas 640 (38 parts)
- Unitas 6450 (35 parts)
- Unitas 6452 (35 parts)
- Unitas 6450N (29 parts)
- Unitas 6452N (29 parts)
- Unitas 6460 (26 parts)
- Unitas 6340 (25 parts)
- Unitas 6342 (25 parts)
- Unitas 6343 (25 parts)
- Unitas 376 (25 parts)
- Unitas 6410 (22 parts)
- Unitas 6411 (22 parts)
- Unitas 6412 (22 parts)
- Unitas 6460N (20 parts)
- Unitas 6340N (19 parts)
- Unitas 6342N (19 parts)
❓ Frequently asked questions
Which Unitas 650 spare parts also fit other movements?
For the Unitas 650, 37 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 650?
The most shared parts: Unitas 640 (38 parts), Unitas 6450 (35 parts), Unitas 6452 (35 parts).
Which mainspring fits the Unitas 650?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.50 × 11.5 × 0.135 × 360 mm (GR 4208, hand-wound, normal end hook).
🛠️ For the workshop
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 ›
Swiss Luminova DIY Kit, Luminous Powder for Watch Hands, C1 C3 C5 Yellow Orange19,95 € – 59,90 € incl. VAT *View item ›
Replacement Sapphire Watch Crystal, Flat, 1.0 mm, Ø 15 - 45 mm22,40 € – 34,90 € incl. VAT *View item ›