Description: Vintage Newall “Security” Brand Swiss mainspring No. 1903, produced from high-grade tempered Swiss steel and intended for bracelet (wrist) watches. Known for their superior quality and reliability, Newall springs were widely used by professional watchmakers throughout the mid-20th century.
Specifications:
Brand: Newall “Security” Brand
Part No: 1903
Width: 1.80 mm
Strength: 0.10 mm
Length: 12 inches (approx. 30.5 cm)
Dennison: 9 x 11
For: Bracelet (wrist) watches
Material: Tempered Swiss alloy steel
Condition: New old stock (NOS), unused, sealed in original wax envelope
Condition Note: This is new old stock (NOS) — unused and sealed in its original paper and wax packaging. The envelope shows age-related wear and light discolouration, and the mainspring may display minor tarnish from long-term storage.
Summary: Original Newall “Security” Brand No. 1903 mainspring, Made in Switzerland, suitable for mid-century wristwatch movements. A reliable replacement component crafted from precision-gauged Swiss material, ideal for collectors, restorers, or watch repair professionals.
Shipping: As usual, this item will be packaged carefully and dispatched with tracking. International shipping is available upon request.
