Watch-Craft Mainspring 4131W – 1.80 x 0.085 x 9¾" – 9 Size / 12½ Ligne

Watch-Craft Mainspring 4131W – 1.80 x 0.085 x 9¾" – 9 Size / 12½ Ligne – USA NOS

Description:
Vintage Watch-Craft 4131W mainspring supplied by C. & E. Marshall Co., USA. Constructed from durable white alloy for rustproof, non-magnetic performance and long service life. Suitable for 9-size or 12½-ligne watch movements, ideal for restoring mid-century wristwatches and pocket watches.

Specifications:

• Brand: Watch-Craft (C. & E. Marshall Co.)

• Part No: 4131W

• Width: 1.80mm

• Strength: 0.085mm

• Length: 9¾ inches (approx. 24.77cm)

• Dennison: 9 / 12½

• Material: White alloy, non-magnetic, rustproof

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

Condition Note:
This is new old stock (NOS) — unused and still in its original packaging. Packaging may show signs of long-term storage, and the mainspring or retaining ring may exhibit minor tarnish or age-related discolouration.
Listing is for one mainspring only; multiple available.

Summary:
Genuine Watch-Craft mainspring made by C. & E. Marshall Co., USA. Perfect for watchmakers and collectors restoring vintage 9-size or 12½-ligne watches. A strong, dependable mainspring from one of the best-known mid-century American suppliers.

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