Vintage Altrax 129 Mainspring – 1.30 mm × 0.081 mm × 8 mm – Unbreakable

Vintage Altrax 129 Mainspring – 1.30 mm × 0.081 mm × 8 mm – Unbreakable Swiss Made NOS

Description:
Genuine vintage Altrax mainspring in original plastic case. A Swiss-made unbreakable and non-deforming mainspring designed for smaller manual-wind wristwatch movements. Ideal for professional watchmakers or collectors of vintage Swiss parts.

Listing is for one mainspring only. Where multiples are available, some orders may not include the original outer packaging.

Specifications:

• Type: Unbreakable mainspring

• Reference: Altrax 129

• Height: 1.30 mm

• Thickness (strength): 0.081 mm

• Barrel diameter: 8 mm

• Material: Tempered unbreakable steel

• Brand: Altrax

• Country of manufacture: Switzerland

Condition:

• New old stock (NOS) – unused and in original case.

• Packaging may show minor age-related wear.

Summary:
A Swiss-made Altrax unbreakable mainspring — an excellent vintage part for small mechanical movements, perfect for servicing or restoration projects.

Postage & Shipping:
As usual, this item will be packaged carefully and dispatched with tracking. International shipping is available through the eBay Global Shipping Programme (GSP).