Technical Archive

Longines
Elegant L4.312.5.87.7— lug 20mm

Longines Elegant L4.312.5.87.7: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Elegant Collection Small Second 34.5 Stainless Steel - Pink Gold / MOP / Bracelet

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Longines L4.312.5.87.7
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

L4.312.5.87.7

Movement

Longines caliber L891.5 Hours, Minutes, Small Seconds

The Heritage

The Longines Elegant is powered by the L891.5 caliber with hours, minutes and small seconds indication. The movement offers the essential time reading functions with a subsidiary seconds display. The L4.312.5.87.7 reference represents a classic offering from the Swiss manufacturer.

FAQ

What is the lug width of the Longines Elegant L4.312.5.87.7?

The lug width of the Longines Elegant L4.312.5.87.7 is 20mm. This measurement is critical when selecting aftermarket straps: always ensure your new strap has a maximum width of 20mm at the lug attachment point. If the strap tapers (wider at the top than at the bottom), verify complete technical specifications before purchase.

Which strap material is most suitable for the Longines Elegant L4.312.5.87.7?

Alligator leather is the ideal choice for the L4.312.5.87.7: its regular texture and controlled lustre reflect the classical aesthetic of this timepiece. Vegetable-tanned calf leather is excellent if you desire a patina that improves with time. For those investing in longevity, shell cordovan offers superior density and resistance, acquiring natural lustre over years. For informal contexts, rubber and fabric remain valid options, provided they are constructed with equal material integrity.

How do you change the strap on a Longines Elegant L4.312.5.87.7?

The strap is changed manually by unscrewing the spring bars (or extracting quick-release attachments, depending on construction). Position the watch with the case facing downward, and use a dedicated tool to extract the bars from the sides. Proceed carefully to avoid scratching the case. Once the previous strap is removed, insert the new one by aligning the strap lugs perfectly with the case attachment holes, then secure the spring bars. If uncertain, consulting a professional watchmaker is always recommended.

Are aftermarket straps available that are compatible with the L4.312.5.87.7?

Yes, milanostraps.it stocks a complete collection of 20mm straps compatible with the L4.312.5.87.7, ready for dispatch. They are customisable in length, initials, and stitching thread colour. For a bespoke experience, the Casati Milano atelier creates artisanal straps with personal leather selection, updates via WhatsApp during production, and an 18-month guarantee.

How long does a leather strap last on a Longines Elegant L4.312.5.87.7?

Longevity depends on construction quality and frequency of wear. A well-crafted alligator or shell cordovan strap lasts 5–10 years in daily use, acquiring patina rather than deteriorating. Vegetable-tanned calf has slightly shorter cycles but remains reliable for 4–7 years. Durability increases significantly if you rotate straps (not wearing the same one daily) and perform periodic maintenance with specialist balms. Artisanal straps from Casati Milano include an 18-month guarantee and can be refurbished after wear.