Rezista Mainspring No. 231B – 1.50 x 0.07 x 8½" – Dennison 6 x 14

Rezista Mainspring No. 231B – 1.50 x 0.07 x 8½" – Dennison 6 x 14 – L.I.C. Product – Swiss NOS

Description:
Vintage Rezista mainspring No. 231B, “The Mark of Quality Since 1925.” Manufactured under the L.I.C. brand, this Swiss-made spring offers high elasticity, durability, and corrosion resistance — ideal for precision wristwatch movements from the mid-20th century.

Specifications:

• Brand: Rezista (L.I.C. Product)
• Part No: 231B
• Width: 1.50 mm
• Strength: 0.07 mm
• Length: 8½ inches (approx. 21.6 cm)
• Dennison: 6 x 14
• Material: Tempered Swiss alloy steel
• End Type: Tongue end
• Condition: New old stock (NOS), unused, supplied with original foil and printed envelope

Condition Note:
This mainspring is new old stock (NOS) — unused and complete in its original foil and paper packaging. The envelope shows light creasing and age-related wear, while the mainspring remains bright and intact.

Summary:
Original Rezista mainspring No. 231B, Made in Switzerland, a quality vintage component for watch repair or restoration. Produced by L.I.C., known for dependable performance and precision manufacture.

Shipping:
As usual, this item will be packaged carefully and dispatched with tracking. International shipping is available upon request.