Altrax Mainspring – 1.60 x 0.0825 x 7.5mm – Incassable / Unbreakable

Altrax Mainspring – 1.60 x 0.0825 x 7.5mm – Incassable / Unbreakable – Swiss Made NOS

Description:
Vintage Altrax unbreakable mainspring, marked “incassable / indérangeable” (unbreakable / non-distorting). This quality Swiss-made spring is precision-engineered for smooth, reliable power delivery in mechanical wristwatches. It comes in its original clear plastic case with specification label intact.

Specifications:

• Brand: Altrax

• Type: Incassable (unbreakable) mainspring

• Width: 1.60 mm

• Strength: 0.0825 mm

• Length (approx.): 7.5 inches

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

• Condition: New old stock (NOS), unused, supplied in original Altrax packaging

Condition Note:
This mainspring is new old stock (NOS) — unused and complete in its original case. The packaging shows minor age discolouration and light handling marks, while the spring remains clean and untarnished.

Summary:
Original Altrax “Incassable / Unbreakable” mainspring, Made in Switzerland, supplied in its original labelled plastic case. A fine-quality vintage spare ideal for traditional watch repair or collection.

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