Strap for Spirit Flyback 42 Stainless Steel / Blue / Bracelet

The Longines Spirit L3.821.4.93.6 features a lug width of 22mm. This measurement refers to the distance between the pins that secure the strap to the case lugs, not the visible case width. It is essential to verify this dimension before purchasing an aftermarket strap to ensure perfect compatibility with the case lugs.

The ideal strap for the Longines Spirit depends on intended use. An alligator strap in Testa di Moro shade respects the watch's avionic heritage and develops authentic patina over time. A vegetable-tanned calf leather in light brown offers daily elegance with visible texture. For a sportier approach, a natural linen NATO strap or FKM rubber strap ensures functionality in demanding environments.

To change the strap, remove the case pins using a dedicated tool (spring bar tool or small hammer). Position the watch in a stable holder, identify the pin direction, and extract it gently. Insert the pin into the new strap ensuring the lugs are aligned. If unfamiliar with the procedure, ateliers such as Casati Milano perform the change with precision and warranty.

Yes. High-quality artisanal aftermarket straps with 22mm width are fully compatible. Milano Straps offers a collection of customisable 22mm straps in premium leather, vegetable-tanned Tuscan leather, alligator, and technical materials. Casati Milano atelier creates bespoke straps on demand, with 18-month warranty and dedicated support.

Lifespan depends on usage, leather quality, and maintenance. An artisanal alligator or calf strap with regular care (avoiding stagnant water, drying after humidity) can last 5–8 years. Vegetable-tanned leather develops natural patina that enhances appearance over time. If the strap shows signs of structural failure or loosening stitching, replacement is recommended. Casati Milano guarantees 18 months of durability on custom-made straps.