Strap for Spirit Chronograph 42 Silver / Strap

The lug width of the Longines Spirit L3.820.4.73.2 is 22mm. This means the case lugs are sized to accommodate straps measuring exactly 22mm at the attachment points. When selecting an aftermarket strap, ensure the width is precisely 22mm to prevent excessive play or friction during wear.

The best material depends on intended use: vegetable-tanned Tuscan leather is ideal for those who appreciate natural colour evolution and wish to emphasise the vintage character; shell cordovan offers superior abrasion resistance and a polished texture that underscores its precision instrument vocation; supple calf leather suits formal occasions; rubber is the most practical choice for water sports. We recommend owning at least two straps to fully exploit this pilot's watch versatility.

To change the strap, position the watch at 12 o'clock on a soft pad. Insert a spring bar tool into the end of the upper lug to compress the internal spring, then pull outward. Repeat for the lower lug. Once the original strap is removed, insert the new strap's bars into the case attachments, compressing gently until you hear a secure click. Verify the strap is properly seated on both lugs before wearing.

Yes, you can use any strap with a 22mm lug width on the Longines Spirit L3.820.4.73.2 case. Quality aftermarket straps in Tuscan leather, shell cordovan, alligator or rubber are fully compatible. We recommend selecting specialised suppliers who guarantee precision in lug width and construction quality, to preserve the value and usability of your timepiece.

Strap longevity depends on tanning method and usage: vegetable-tanned calf typically lasts 3–4 years of daily wear, developing desirable patina; shell cordovan, due to its density, may last 5–6 years or longer without appreciable wear; soft calf tends to fail sooner, within 2–3 years. Factors such as humidity, direct sunlight and frequency of strap changes affect durability. Rubber straps offer greater longevity (4–5 years) but require periodic cleaning to remain intact.