Mainspring for AS 1903 Aut

Height, diameter, thickness and length

1.45 × 10.5 × 0.115 × 360 mmheight × diameter × thickness × length

Note: We have transcribed this information to the best of our knowledge from the Générale Ressorts mainspring catalogue (GR 2, 1974). All information has been carefully checked but is provided without guarantee. Please check yourself before fitting that the mainspring fits, in particular height, diameter, thickness and length.

📏 Mainspring dimensions

GR no.	Height	Diameter	Thickness	Length	Type
3998-1X	1.45 mm	10.5 mm	0.115 mm	360 mm	Automatic, with welded slipping bridle, special version (1X)

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 20.

🛒 Matching mainspring in our shop

According to the catalogue, this mainspring has a special form (Automatic, with welded slipping bridle, special version (1X)). We therefore do not show shop items automatically here – feel free to write to us. Contact form

🔧 Interchangeable spare parts

Which other spare parts of AS 1903 fit other calibers:

Interchangeability AS 1903

🔗 According to the catalogue, the same mainspring (GR 3998-1X) also fits

❓ Frequently asked questions

Which mainspring fits the AS 1903 Aut?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.45 × 10.5 × 0.115 × 360 mm (GR 3998-1X, automatic, with welded slipping bridle, special version (1X)).