Vintage Isoflex Mainspring No.440 – 1.50mm x 0.075mm x 270mm – Unbreakable Swiss

Vintage Isoflex Mainspring No. 440 – 1.50mm x 0.075mm x 270mm – Unbreakable Swiss Made

Description:
Genuine vintage Isoflex mainspring No. 440 by Douz Ressorts, supplied in its original packaging. A high-quality unbreakable and inoxydable (rust-resistant) mainspring, ideal for vintage wristwatch restoration.

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

Specifications:

• Type: Isoflex mainspring

• Reference: No. 440

• Height (H): 1.50 mm

• Barrel diameter (Dm): 7.5 mm

• Thickness (Ep): 0.075 mm

• Length (Lg): 270 mm

• Material: Unbreakable steel alloy

• Brand: Douz Ressorts / Isoflex

Condition:

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

• Packaging shows minor age wear.

Summary:
A fine Swiss-made Isoflex mainspring, renowned for its durability and performance. Perfect for vintage watchmakers, restorers, or collectors.

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).