Mainspring for Recta F 3
Height, diameter, thickness and length
📏 Mainspring dimensions
| GR no. | Height | Diameter | Thickness | Length | Type |
|---|---|---|---|---|---|
| 4121 | 1.50 mm | 8.5 mm | 0.10 mm | 280 mm | Hand-wound, normal end hook |
All dimensions in millimetres. The height of a mainspring is often also called its “width”. Source: Générale Ressorts, mainspring catalogue GR 2 (March 1974), page 164.
🛒 Matching mainspring in our shop
Only mainsprings with exactly the same height, thickness and length are shown; the diameter is equal or up to 1 mm smaller – a smaller spring settles in the barrel.
🔄 Alternative mainsprings
Mainspring 1,5-8,5-0,09-30010,90 € incl. VAT *View item
Mainspring 1,5x8,5x0,1x29011,90 € incl. VAT *View itemSame height, diameter equal or slightly smaller. Please check yourself before ordering.
🔗 According to the catalogue, the same mainspring (GR 4121) also fits
- EHF 183
- EHF 183-1
- EHF 207
- Election 62
- Election 500
- Felsa 179
- Felsa 330
- Geneva 23.7-4
- Gruen 587
- Jeambrun 217 9 3/3"
- Jeambrun 217 10 1/2"
- Lavina 10 1/2" 123
- Lavina 10 V2 - 28
- Minerva 48-10 1/2-49-50
- Oris 450 A
- Oris 451 A
- Osco 1065
- Recta 10 1/2 FFA
- Recta FB 5
- Recta FG
- Recta FL
- Rolex 10 '/2 Speed King
- Rolex 10 '/2-8 HW
- Universal 260
- Universal 261
- Wittnauer 11D
❓ Frequently asked questions
Which mainspring fits the Recta F 3?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.50 × 8.5 × 0.10 × 280 mm (GR 4121, hand-wound, normal end hook).
Is this mainspring available in the shop?
Yes, Master Watch Parts currently has 1 matching mainsprings in stock.
Which other calibers use mainspring GR 4121?
According to the catalogue also in EHF 183, EHF 183-1, EHF 207, Election 62, Election 500 and 21 other calibers.
🛠️ For the workshop
Clock Key 2-4-6-8-10, Star Key for Large Clocks and Wall Clocks, Brass – New8,49 € incl. VAT *View item ›
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 ›