Strap for Spirit Zulu Time 42 Black / Bracelet

The lug width (or lug-to-lug distance) of the Longines Spirit L3.812.4.53.6 is 22mm. This dimension represents the width between the lugs where the strap attaches. It is a standard measurement for many Swiss sports chronographs of medium to large format, offering a wide selection of compatible aftermarket straps.

Given the aviator and tool-watch character of the model, we recommend Tuscan leather with vegetable tanning in dark brown (testa di moro) or havana tones, with medium grain texture. This develops an elegant patina over time and honours the sobriety of the case. Alternatives include cognac-coloured box calf for refinement, or black rubber for daily sporting use.

Strap replacement is performed by removing the spring bars positioned at the lugs. Use a fine screwdriver or spring bar tool to depress the retaining catch, then extract the strap. Insert the new strap by aligning the bars with the housings and push until the click lock engages. A straightforward operation, executable at home or at a watchmaker's.

Yes. Since the 22mm lug width is a consolidated standard, all artisanal straps of this width are compatible. Always verify that the strap has an appropriate passant (distance between the bar attachments) suitable for your wrist: the lug-to-lug of this model is approximately 53–54mm. At milanostraps.it you will find a complete selection of customizable 22mm straps.

A high-quality vegetable-tanned leather strap typically lasts 3–5 years with daily use. Longevity depends on humidity exposure, cleaning frequency and how the watch is worn. Tuscan leather ages beautifully, developing patina and character. Casati Milano offers an 18-month warranty on all custom straps, with the possibility of early replacement of the passant bar in case of premature wear.