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Archimede · Outdoor

Strap for OutDoor 39 Protect Stainless Steel / Red / Bracelet

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

Lug width

20mm
20 mm strapsAll Archimede
Lug width20 mm
Case diameter39 mm
ReferenceUA8239B-A6.1-H
FamilyOutdoor
MovementSellita caliber SW200-1 a 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

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Straps for the Outdoor UA8239B-A6.1-H

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Outdoor UA8239B-A6.1-H, seen from the bench

The Archimede Outdoor reference UA8239B-A6.1-H features the automatic Sellita SW200-1 Caliber with indication of hours, minutes, seconds and date. The movement provides essential functions for daily use with standard power reserve. The watch has 20mm lugs for the strap.

Frequently asked questions

What is the lug width of the Archimede Outdoor UA8239B-A6.1-H?

The lug width of the Archimede Outdoor UA8239B-A6.1-H is 20 millimetres. This particular dimension represents a balanced compromise between the robustness required for outdoor activities and the elegant proportions of the 39-millimetre case design.

Which strap is best suited for the Archimede Outdoor UA8239B-A6.1-H?

The ideal strap depends on intended usage. For daily elegance, we recommend calf leather with vegetable tanning that develops natural patina. For sporting activities, a NATO strap in technical fabric or water-resistant rubber offers superior functionality. Alligator in formal version represents the luxury choice. All are available in 20mm width on milanostraps.it.

How do I change the strap on the Archimede Outdoor UA8239B-A6.1-H?

The change requires an appropriate diameter strap removal tool for 20mm lugs. Position the watch on a soft surface, insert the tool from the inside outward, gently pushing the pin. Repeat for both sides. The operation requires precision: we recommend having it performed by an expert if you lack experience.

What is the average lifespan of a leather strap for the Archimede Outdoor UA8239B-A6.1-H?

A quality leather strap with vegetable tanning typically lasts 3-4 years with daily use and regular maintenance. Calf in particular develops aesthetic patina over time. Rubber and NATO straps offer superior durability, up to 5-6 years, with less need for treatment.

Are aftermarket straps compatible with the Archimede Outdoor UA8239B-A6.1-H?

Yes, any strap with 20mm lug width is compatible. Milanostraps.it offers an exclusive collection of artisanal straps in this width, custom-made by Casati Milano with millimetre precision. Compatibility is guaranteed.

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