Vintage Altrax Mainspring No.138 – 1.30 mm x 0.14 mm x 12 mm – Unbreakable Swiss

Description:
Genuine vintage Altrax mainspring No. 138, Swiss Made and supplied in its original packaging. A high-quality unbreakable and non-deforming mainspring, ideal for servicing or restoring vintage manual-wind wristwatches.

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

Specifications:

• Type: Unbreakable mainspring
• Reference: No. 138
• Height: 1.30 mm
• Thickness (strength): 0.14 mm
• Barrel diameter: 12 mm
• Material: Tempered unbreakable steel
• Brand: Altrax
• Country of manufacture: Switzerland

Condition:

• New old stock (NOS) – unused and in original packaging.
• Packaging shows minor age-related wear.

Summary:
A genuine Swiss-made Altrax mainspring offering exceptional quality and resilience. Perfect for professional watchmakers, collectors, and restorers seeking reliable vintage components.

Postage & Shipping:
As usual, this item will be packaged carefully and dispatched with tracking. International shipping is available upon request.