Certina · DS-1

Strap for DS-1 Powermatic 80 40 Stainless Steel / Black / Bracelet

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

Lug width20 mm
Case diameter40 mm
ReferenceC029.807.11.051.00
FamilyDS-1
MovementETA caliber C07.111 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 DS-1 C029.807.11.051.00

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The DS-1 C029.807.11.051.00, seen from the bench

The Certina DS-1 C029.807.11.051.00 is a 40mm stainless steel professional tool watch featuring a robust ETA C07.111 automatic movement with 28,800 bph and 42-month power reserve. The 316L steel case offers 300m water resistance and 11mm thickness, while the 20mm lug width accommodates quality straps worldwide. A classic dial with hours, minutes, seconds and date window prioritizes absolute legibility without unnecessary complications.

Frequently asked questions

What is the lug width of the Certina DS-1 C029.807.11.051.00?

The lug width of the Certina DS-1 C029.807.11.051.00 is 20mm. This dimension allows compatibility with a wide range of high-quality aftermarket straps. The 20mm standard represents the ideal width for compact tool watches, maintaining balanced proportions relative to the 40mm case.

Which strap is most suitable for the Certina DS-1?

For the DS-1 20mm, we recommend four primary options: brown or black alligator for versatile elegance, vegetable-tanned calf for maturing patina and uniqueness over time, cotton-polyester NATO for aquatic and sporty environments, and vulcanised rubber for extreme conditions. Your choice depends on intended use: professional-formal with alligator, daily casual with NATO, intense sporting with rubber.

How do you change the strap on the Certina DS-1?

DS-1 20mm strap replacement is accomplished by removing the spring bar pin that passes through the lug. Use a dedicated tool or small flat screwdriver to apply controlled pressure on one end of the pin, extracting it from its seat. Insert the new strap by aligning the lug holes, then reinsert the pin and verify secure locking. Do not force to avoid damaging the case.

Is an aftermarket strap compatible with the Certina DS-1 20mm?

Yes, aftermarket straps with 20mm lug width are fully compatible with the Certina DS-1 C029.807.11.051.00. The 20mm standard is extremely widespread globally, ensuring access to professional quality catalogues. Verify that the strap is specified for 20mm lug width and features correct pins for your deployant type if applicable.

How long does a leather strap last on the Certina DS-1?

A high-quality leather strap (alligator, calf, shell cordovan) typically lasts 2-4 years on a daily-worn tool watch like the DS-1 subject to occasional impacts. Longevity depends on maintenance, climate, wear frequency, and leather type. Vegetable tanning typically ages better than industrial tanning, developing rich patina. Rubber and NATO straps last 4-6 years with superior performance in extreme environments.

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