Mainspring for Cortebert 425 II
Height, diameter, thickness and length
📏 Mainspring dimensions
| GR no. | Height | Diameter | Thickness | Length | Type |
|---|---|---|---|---|---|
| 4428 | 1.60 mm | 6.5 mm | 0.07 mm | 240 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 40.
đź›’ Matching mainspring in our shop
🔄 Alternative mainsprings
Same height, diameter equal or slightly smaller. Please check yourself before ordering.
đź”— According to the catalogue, the same mainspring (GR 4428) also fits
âť“ Frequently asked questions
Which mainspring fits the Cortebert 425 II?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.60 × 6.5 × 0.07 × 240 mm (GR 4428, 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 4428?
According to the catalogue also in AS 964, Benrus AF 6/7", Bulova 7 BU, Bulova 7 WF, Rolex 1061 and 2 other calibers.
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