Zeitwinkel · 39mm Midsize

Strap for 081° Black

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter39 mm
Reference081° Black
Family39mm Midsize
MovementZeitwinkel caliber ZW0102 CS hours, minutes, seconds | date
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 39mm Midsize 081° Black

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The 39mm Midsize 081° Black, seen from the bench

The Zeitwinkel 39mm Midsize reference 081° Black is equipped with the automatic caliber ZW0102 CS with hour, minute, second and date indication. The case has a diameter of 39mm with 18mm lugs. The movement offers the essential timekeeping functions with a date complication.

Frequently asked questions

What is the lug width of the Zeitwinkel 39mm Midsize 081° Black?

The lug width of the Zeitwinkel 081° Black is 18mm. This intermediate size represents the ideal standard for medium-sized wrists and is compatible with the entire collection of 18mm straps available on milanostraps.it. To verify correct measurement, use a calliper or ruler positioned perpendicular to the case, from the inside of one lug to the inside of the other.

What is the best strap for the Zeitwinkel 081° Black?

Strap selection depends on use and aesthetic preference. For a minimalist German profile consistent with the design, we recommend a black calf leather strap with vegetable tanning and a stainless steel deployante. For those seeking chromatic warmth, alligator in burgundy or cognac tones amplifies authority whilst maintaining refinement. For sporting or daily use, a NATO in cordura grey anthracite or navy blue offers practicality without distracting from the black dial.

How do you change the strap on the Zeitwinkel 081° Black?

The strap is changed by removing the spring bar that connects the lug to the case. Use a dedicated tool (spring bar tool) to compress the bar laterally until it releases from the metal bar. Insert the new strap into the lug, then reinsert the spring bar, ensuring it clicks fully into position. The operation requires precision to avoid scratches: Atelier Casati Milano offers professional change service by appointment.

Which aftermarket straps are compatible with this model?

All straps with an 18mm lug width are compatible with the Zeitwinkel 081° Black. On milanostraps.it you will find a complete selection of handcrafted straps in alligator, shell cordovan, calf, NATO and FKM rubber, all sized 18mm and ready for dispatch. Compatibility is guaranteed by the standardisation of lug width, regardless of the strap brand.

How long does a leather strap last on a daily-wear watch?

The lifespan of a quality leather strap ranges from 3 to 7 years depending on frequency of use and type of tanning. A calf strap with vegetable tanning, worn daily, develops natural patina within the first months and maintains structural integrity for 4-5 years. Alligator tends to last slightly longer due to grain structure. FKM rubber offers superior durability (7-10 years) but less aesthetic evolution. Atelier Casati Milano offers leather maintenance and reconditioning services.

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