Watch-Craft Mainspring 2739W 1.30 x 0.11 x 10½", AS653 MST348 MO-730M GR266 LA12

Watch-Craft Mainspring 2739W – 1.30 x 0.11 x 10½" – Dennison 4 / 10 – AS653, MST348, MO-730M, GR266, LA12 – USA NOS

Description:
Vintage Watch-Craft 2739W mainspring, manufactured by C. & E. Marshall Co., USA. Made from durable white alloy for non-magnetic, unbreakable, and rustproof performance. Suitable for a range of mid-century Swiss watch movements, including AS653, MST348, MO-730M, GR266, and LA12 calibres.

Specifications:

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

• Part No: 2739W

• Width: 1.30mm

• Strength: 0.11mm

• Length: 10½ inches (approx. 26.7cm)

• Dennison: 4 / 10

• Compatible Movements: AS653, MST348, MO-730M, GR266, LA12

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

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

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

Summary:
Genuine Watch-Craft 2739W mainspring by C. & E. Marshall Co., designed for a variety of Swiss movements such as AS, MST, GR, and MO series calibres. Perfect for vintage watch restorations or professional repair work.

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