Altrax Mainspring No. 152 – 1.35 x 0.0825 x 7.5 mm – Swiss

Altrax Mainspring No. 152 – 1.35 x 0.0825 x 7.5 mm – Unbreakable Swiss White Alloy – NOS

Description:
Vintage Altrax unbreakable mainspring, precision-made in Switzerland. These high-grade mainsprings are known for their durability, accuracy, and long service life. They are supplied individually from an original pack of five — each mainspring is unused and factory-coiled in its metal retaining ring.

Specifications:

• Brand: Altrax

• Reference: No. 152

• Width: 1.35 mm

• Strength: 0.0825 mm

• Length: 7.5 inches

• Material: White alloy (anti-corrosive, non-magnetic)

• Type: Incassable / unbreakable

• Condition: New old stock (NOS), unused, individually supplied (original packaging photographed for reference only)

Condition Note:
Each mainspring is new old stock, unused, and still factory-sealed in its metal retaining ring. The outer packaging from the original pack shows light age wear but is not included with individual sales.

Summary:
Quality Swiss Altrax unbreakable mainspring No. 152 — 1.35 mm x 0.0825 mm x 7.5 inches. Ideal for traditional mechanical wristwatch repairs or as a correct-period replacement for mid-century Swiss movements.

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