Mainspring for FHF 86
Height, diameter, thickness and length
📏 Mainspring dimensions
| GR no. | Height | Diameter | Thickness | Length | Type |
|---|---|---|---|---|---|
| 3924 | 1.45 mm | 7.5 mm | 0.08 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 82.
🛒 Matching mainspring in our shop
🔄 Alternative mainsprings
Same height, diameter equal or slightly smaller. Please check yourself before ordering.
🔗 According to the catalogue, the same mainspring (GR 3924) also fits
❓ Frequently asked questions
Which mainspring fits the FHF 86?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.45 × 7.5 × 0.08 × 280 mm (GR 3924, hand-wound, normal end hook).
Is this mainspring available in the shop?
An exact match is not in stock right now, but 1 similar mainsprings are possible alternatives.
Which other calibers use mainspring GR 3924?
According to the catalogue also in Rolex 219 Tudor, Silvana 5090, Unitas 580, West End secundus 5 3/4", Winton 104-36.
🛠️ For the workshop
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