Watch-Craft Mainspring 4251W – 1.80 x 0.1125 x 12¼" – Dennison 9 / 10

Watch-Craft Mainspring 4251W – 1.80 x 0.1125 x 12¼" – Dennison 9 / 10 – USA NOS

Description:
Vintage Watch-Craft 4251W mainspring, manufactured by C. & E. Marshall Co., USA. Constructed from high-quality white alloy, this mainspring offers non-magnetic, unbreakable, and rustproof performance, and comes lifetime lubricated for durability. Designed for mid-sized wristwatch and small pocket watch movements requiring a strong, wide spring.

Specifications:

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

• Part No: 4251W

• Width: 1.80mm

• Strength: 0.1125mm

• Length: 12¼ inches (approx. 31cm)

• Dennison: 9 / 10

• Material: White alloy – non-magnetic, unbreakable, rustproof

• Lubrication: Factory lifetime-lubricated

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

Condition Note:
This is new old stock (NOS) — unused and sealed in its original packaging. Packaging may show signs of age or handling, and the mainspring or retaining ring may exhibit light tarnish from long-term storage.

Summary:
Original Watch-Craft 4251W mainspring produced by C. & E. Marshall Co., a respected American supplier of professional watchmaking parts and tools. Excellent replacement for vintage Swiss or American mechanical watch movements using this specification.

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