Description: Vintage Nu Vigor mainspring No. 84D, made in Switzerland and designed for Benrus 7¾ L “I” wristwatch movements. Known for their precision and quality, Nu Vigor springs were widely used by professional watchmakers in the mid-20th century, adding reliable power and longevity to classic timepieces.
Specifications:
Brand: Nu Vigor
Part No: 84D
For: Benrus 7¾ L “I” movement
Width: 1.60 mm
Strength: 0.07 mm
Length: 24.13 mm (9½ inches)
Dennison: 7 x 14
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 still sealed in its original packaging. The paper envelope shows light ageing and marks from storage, and the mainspring may display slight tarnish from long-term preservation.
Summary: Original Nu Vigor mainspring No. 84D, Made in Switzerland, suitable for Benrus 7¾ L “I” and similar mid-century wristwatch calibres. A quality Swiss replacement part ideal for collectors, restorers, or vintage watch repairers.
Shipping: As usual, this item will be packaged carefully and dispatched with tracking. International shipping is available upon request.
