Vintage Altrax Mainspring – 1.35 mm × 0.10 mm × 8.5 mm – Unbreakable Swiss Made

Vintage Altrax Mainspring – 1.35 mm × 0.10 mm × 8.5 mm – Unbreakable Swiss Made NOS

Description:
Genuine vintage Altrax mainspring, Swiss Made. A precision unbreakable and non-deforming mainspring suitable for small-to-medium manual-wind wristwatches. Supplied loose in a protective sleeve (no original packaging).

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

Specifications:

• Type: Unbreakable mainspring

• Height: 1.35 mm

• Thickness (strength): 0.10 mm

• Barrel diameter: 8.5 mm

• Material: Tempered unbreakable steel

• Brand: Altrax

• Country of manufacture: Switzerland

Condition:

• New old stock (NOS) – unused, supplied loose without original packaging.

• Stored in clean protective sleeves.

Summary:
A genuine Swiss-made Altrax unbreakable mainspring ideal for restoring or servicing smaller vintage wristwatches. Perfect for watchmakers, collectors, and restorers.

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).