Strap for Pilot Watch Special Models DC-3 / Stainless steel / Black

The lug width of the Laco Pilot Watches 861901 is 20 millimetres. This is the precise distance between the two attachment pins (lug to lug) and represents the only compatible dimension for strap installation. To verify correct measurement, use a digital calliper positioned perpendicularly between the two pins: the reading must correspond exactly to 20 millimetres to ensure proper fit and secure fastening.

For the 861901, we recommend an alligator strap in natural brown or a full-grain calf leather with vegetable tanning in deep black, as these reflect the austere Bauhaus aesthetic of the design. For a more sporting solution, a NATO strap in navy blue or FKM rubber in light grey maintains formal balance without functional compromise. The choice depends on usage: urban elegance calls for full-grain leather, summer practicality suggests NATO or rubber.

Changing the strap on a Laco Pilot Watches requires a spring bar tool for pin extraction. Position the watch on a flat surface, insert the tool tip into the small lateral hole of the first lug, apply gentle pressure to slide the spring bar inward, then carefully withdraw the exhausted strap. Repeat the operation on the second side, then secure the new 20mm strap by aligning it correctly with the attachment pins and pressing until the locking click is heard.

Yes, any strap with a 20-millimetre lug width is compatible with the 861901, provided the strap width itself does not substantially exceed the lug width (ideally between 19 and 21 millimetres). Bespoke artisanal straps such as those offered by Casati Milano and Milano Straps are crafted to specification for this dimension and guarantee secure fastening and perfect fit. Always ensure that the construction quality of the aftermarket strap provides the same reliability as the case itself.

The lifespan of a leather strap depends on material quality and conditions of use. An alligator strap with vegetable tanning, if subjected to regular maintenance (occasional cleaning with a damp cloth, protection from extreme humidity), maintains aesthetic functionality for 7–10 years. Full-grain calf has a similar service life, whilst ordinary leather may degrade within 3–5 years. Exposure to perspiration, humidity and UV radiation accelerates ageing: to extend strap life, avoid prolonged water contact and store in a dry environment when unworn.