Longines · Conquest Heritage

Strap for Conquest Heritage 40 Stainless Steel / Blue / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
ReferenceL1.650.4.92.6
FamilyConquest Heritage
MovementLongines caliber L888.5 ND hours, minutes, seconds | chronometer
Year2025
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Conquest Heritage L1.650.4.92.6

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Conquest Heritage L1.650.4.92.6, seen from the bench

The Longines Conquest Heritage L1.650.4.92.6 features a 40mm stainless steel case with a blue dial and combines Swiss watchmaking heritage with contemporary design. Powered by the automatic Longines L888.5 ND caliber (4Hz, 42-hour power reserve, chronometer-certified to ±4/-6 seconds daily), this model delivers precision and reliability. The 20mm lug width is a historic standard derived from military chronographs and European aviation instruments, requiring exact measurement for proper strap compatibility.

Frequently asked questions

What is the lug width of the Longines Conquest Heritage L1.650.4.92.6?

The Longines Conquest Heritage L1.650.4.92.6 requires watch straps with a lug width of 20mm. This measurement is uncommon in the modern chronograph market and demands precision when selecting aftermarket straps. The measurement must be taken between the centres of the two attachment holes on the case lugs.

Which type of strap is recommended for this Longines model?

For the Conquest Heritage L1.650.4.92.6, we recommend alligator Niloticus straps (fine grain, brown or burgundy tones), vegetable-tanned calf leather (aesthetic and formal versatility), or shell cordovan for those seeking durability and natural patina development over time. Your choice depends on intended use: exotic leather for formal contexts, cotton-polyester NATO straps for sporty versatility.

How do you change the strap on the Longines Conquest Heritage L1.650.4.92.6?

Strap replacement requires a spring bar removal tool. Insert the tool's tip into the small internal hole at the lug, apply gentle pressure to disengage the spring's end, then extract the elastic pin. Repeat on the opposite side. During the procedure, protect the crystal and case with a soft cloth. If you are inexperienced, entrust the operation to a professional to avoid scratches.

What is the expected lifespan of a leather strap on the Longines Conquest Heritage L1.650.4.92.6?

A quality leather strap (alligator, calf, shell cordovan) offers a lifespan of 3 to 5 years with daily use and regular maintenance. Longevity depends on factors including: frequency of use, moisture exposure, tanning quality and periodic maintenance. Vegetable-tanned straps age elegantly; exotic leather straps require occasional lug lubrication to prevent cracking.

Are there aftermarket straps available that are compatible with the L1.650.4.92.6?

Yes, milanostraps.it offers a selection of 20mm-width compatible straps ready for dispatch, customisable in dimensions, colour, initials and stitching thread. The Casati Milano atelier additionally produces fully bespoke straps tailored to specification, with leather selection, photographic updates via WhatsApp during crafting and an 18-month guarantee on stitching.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only