Technical Archive

Laco
Classics 861861— lug 18mm

Laco Classics 861861: 18mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Classics Berlin / Stainless Steel / White

Artisanal Note

"This model requires a precise 18mm lug width to preserve the original sartorial balance."

Technical Specifications

Laco 861861
Lug Width
18 mm

The essential strap measurement.

Browse 18mm straps →
Reference

861861

Movement

ETA caliber 2892 Flyback Hours, Minutes, Seconds | Date | Chronograph, Flyback

The Heritage

The Laco Classics reference 861861 is equipped with an automatic ETA 2892 caliber with a flyback chronograph function. The watch features hour, minute, second, and date indications. The movement offers the flyback complication, which allows for the instant reset of the chronograph while in operation.

FAQ

What is the lug width of the Laco Classics 861861?

The Laco Classics 861861 features an 18-millimetre lug width (ansa). This dimension is fully standardised and compatible with any strap from our 18mm collection. To verify compatibility with a strap you already own, remove the spring bars and measure the internal distance between the top and bottom lugs.

Which strap do you recommend for the Classics 861861?

The Laco Classics 861861, given its German aviation heritage, pairs exceptionally well with three solutions. A vegetable-tanned alligator in brown or black amplifies the geometry of the steel case and the minimalist dial legibility. European calf leather with a wax finish in chocolate tones develops patina over time, ideal for formal wear. A NATO strap in ballistic canvas khaki immediately evokes its military origins whilst maintaining visual balance and operational practicality.

How do I change the strap on the Laco 861861?

Strap replacement is a straightforward operation requiring a spring bar tool (readily available from any watch retailer). Position the watch on a soft surface, insert the tool into the lower spring bar slot, and lift the existing strap parallel to the case until the spring bar tension releases. Remove the bar with tweezers and repeat on the opposite side. Fit the new strap onto both bars, ensuring the internal springs click properly into place. Alternatively, contact Casati Milano for bespoke replacement by appointment.

Are aftermarket straps compatible with the Laco Classics 861861?

Yes, any strap with an 18mm lug width is mechanically compatible with the Classics 861861. However, we recommend selecting straps of construction quality commensurate with the watch itself: artisanal calf in vegetable tanning, full-grain alligator leather, or military-weight textiles. Our atelier guarantees precise engineering tolerances and finishing standards that honour the original German design.

How long does a leather strap last on a watch like the Laco 861861?

A high-quality artisanal leather strap typically lasts between 3 and 7 years, depending on frequency of wear, exposure to humidity, and preventative maintenance. Vegetable-tanned leather visibly ages, developing rich patina. To extend service life, avoid prolonged immersion in fresh water, apply a light conditioner every 6–8 months, and store the strap away from direct sunlight when the watch is not worn. A NATO or rubber strap lasts considerably longer—10–15 years—but does not develop the same aesthetic evolution.