B&C Trufit Mainspring – For Font. 120 – 1.30 x 0.08 x 25.40 mm – Dennison 4 x 13

B&C Trufit Mainspring – For Font. 120 – 1.30 x 0.08 x 25.40 mm – Dennison 4 x 13 – Swiss NOS

Description:
Vintage B&C Trufit mainspring made in Switzerland, supplied for Fontainemelon calibre 120 (FHF 120) movements. This precision-gauged Swiss mainspring is of the highest quality, providing reliable and consistent power delivery. Perfect for vintage wristwatch restorations or servicing work.

Specifications:

• Brand: B&C Trufit

• For: Fontainemelon (FHF) calibre 120

• Width: 1.30 mm

• Strength: 0.08 mm

• Length: 25.40 mm (10 inches)

• Dennison: 4 x 13

• End Type: Tongue end

• Material: Tempered Swiss alloy steel

• Condition: New old stock (NOS), sealed in original wax envelope

Condition Note:
This is new old stock (NOS) — unused and still sealed in its original paper and wax packaging. The envelope shows some wear and staining from age, and the mainspring may display minor tarnish due to long-term storage.

Summary:
Original B&C Trufit mainspring for Fontainemelon calibre 120, made in Switzerland. These mainsprings were produced to exacting standards for professional watchmakers and are commonly used in mid-20th-century Swiss wristwatch movements.

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