Mainspring for Bulova 13 AP
Height, diameter, thickness and length
📏 Mainspring dimensions
| GR no. | Height | Diameter | Thickness | Length | Type |
|---|---|---|---|---|---|
| 4123 | 1.50 mm | 9.0 mm | 0.10 mm | 320 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 35.
🛒 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 4123) also fits
❓ Frequently asked questions
Which mainspring fits the Bulova 13 AP?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.50 × 9.0 × 0.10 × 320 mm (GR 4123, 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 4123?
According to the catalogue also in Angelus 1475/270, Bulova 11 AERC, Eterna 1159, Eterna 1159 H, Eterna 1237 and 17 other calibers.
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