Laco · Pilot Watches

Strap for Pilot Watch Basic Altenburg Stainless Steel / Black

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

Lug width20 mm
Case diameter42 mm
Reference861759.2
FamilyPilot Watches
MovementETA caliber 6497-1 Hours, Minutes, Small Seconds
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 Pilot Watches 861759.2

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Pilot Watches 861759.2, seen from the bench

The Laco Pilot Watch 861759.2 is a 42mm stainless steel flieger watch with satin finish, powered by the ETA caliber 6497-1 manual-wind movement. It features a pure white dial with Arabic numerals and knife hands for maximum legibility, following the austere design principles of the original Luftwaffe navigation chronometers from World War II. The 20mm lug width is proportioned to balance the 42mm case diameter.

Frequently asked questions

What is the lug width of the Laco Pilot Watches 861759.2?

The Laco Pilot Watches 861759.2 features a 20mm lug width. This measurement—the distance between the inner shoulders of the lugs—is the critical parameter for selecting a compatible strap. Always verify this dimension with a digital caliper before ordering a new strap, as incorrectly sized straps will not fit properly or may cause excessive play.

What is the best strap for the Laco Pilot Watches 861759.2?

There is no universal best choice; the decision depends on intended use. For formal or dress-up occasions: alligator in cognac or black tones, which develops a noble patina over time. For daily wear and visible ageing: vegetable-tanned calf, which changes colour naturally. For sports or aquatic situations: Cordura canvas or vulcanised FKM rubber. The Laco Pilot Watches accommodates all these solutions whilst maintaining its identity.

How do I change the strap on the Laco Pilot Watches 861759.2?

Strap replacement is a straightforward operation. Locate the spring bars that attach the strap to the case. Using a dedicated removal tool or a sterile needle, push the spring bar upward to access the stop groove. Once freed, extract the old strap. Insert the new strap by aligning the holes with the lug shoulders, then push the spring bar downward until it clicks into place. If the spring bar is stuck or the procedure is not smooth, consult a qualified watchmaker.

Is an aftermarket 20mm strap compatible with this model?

Yes, any strap with a 20mm lug width is compatible with the Laco Pilot Watches 861759.2, regardless of brand. Compatibility is guaranteed by the lug width parameter alone. However, we recommend selecting straps of construction quality equal to the movement—vegetable-tanned leather, vulcanised rubber, or certified canvas—to avoid compromising the technical integrity of the watch.

How long does a leather strap last on this model?

Longevity depends on material and frequency of wear. An alligator or vegetable-tanned calf strap resists 3–5 years of daily wear before requiring replacement, developing a visibly aged patina during this period that enriches the aesthetic. Synthetically-dyed leather or low-quality materials degrade more rapidly, within 12–24 months. Vulcanised rubber and Cordura canvas NATO straps easily achieve 7–10 years of useful life. Storing the strap away from direct sunlight and prolonged humidity extends longevity.

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