Milano Straps
← Certina

ITENDEFRES

SearchCart
Menu

Certina · DS-4

Strap for DS-4 Day-Date

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 Certina
Lug width20 mm
Case diameter38 mm
ReferenceC0224301603100
FamilyDS-4
MovementETA caliber 2836-2 hours, minutes, seconds | date, day
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

View →

Straps for the DS-4 C0224301603100

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The DS-4 C0224301603100, seen from the bench

The Certina DS-4 reference C0224301603100 is powered by the automatic ETA 2836-2 caliber with functions of hours, minutes, seconds, date and day of the week. The ETA 2836-2 movement represents a well-established technical solution in the segment of automatic watches with calendar complications. The configuration includes the display of the day in addition to the date, a distinctive feature of this Swiss caliber.

Frequently asked questions

What is the lug width of the Certina DS-4 C0224301603100?

The <a href="/pages/termine-glossario/misura-ansa">lug width</a> of the Certina DS-4 C0224301603100 is 20 millimetres. This width should be measured with a digital calliper positioned perpendicularly between the inner edges of both lugs, and is the fundamental parameter for ensuring compatibility with any aftermarket strap. Measurement error results in mechanical incompatibility and impossible installation.

Which strap is recommended for the Certina DS-4 C0224301603100?

The choice depends on usage context. For daily elegance, an <a href="/pages/termine-glossario/alligatore">alligator leather strap</a> with <a href="/pages/termine-glossario/concia-vegetale">vegetable tanning</a> enhances the sport-elegance character. For extreme durability and longevity, <a href="/pages/termine-glossario/shell-cordovan">shell cordovan</a> maintains structural integrity for decades. For marine and humid environments, cotton gabardine NATO or FKM rubber offer total waterproofness. Milano Straps' 20mm straps are available in all these categories.

How do I change the strap on the Certina DS-4 C0224301603100?

The strap is changed using a spring bar tool, a thin rod-shaped instrument with a pin fork at the tip. Position the tip beneath the lug end and push outward to release the suspension bar (spring bar) from one side, then remove the old strap. Repeat on the other side. Insert the new strap by aligning the hole with the bar, pushing until you hear a click. Verify that the strap is securely attached before wearing the watch.

Which aftermarket straps are compatible with the Certina DS-4 C0224301603100?

All straps fitted with 20-millimetre lugs are compatible. Milano Straps offers a specialised collection in this size, available in alligator leather, shell cordovan, NATO webbing, and technical FKM rubber. Each strap is handcrafted in Italy and tested to guarantee precise manufacturing tolerances, ensuring smooth installation and durability.

How long does a leather strap last on the Certina DS-4?

Longevity depends on material and usage. An <a href="/pages/termine-glossario/alligatore">alligator strap</a> with <a href="/pages/termine-glossario/concia-vegetale">vegetable tanning</a> lasts 4–6 years with daily wear, developing patina and character. <a href="/pages/termine-glossario/shell-cordovan">Shell cordovan</a> exceeds 8–10 years due to fibre density. Fabric NATO straps last 3–5 years. FKM rubber resists 5–7 years in saline environments. Regular maintenance (gentle cleaning, drying after saltwater exposure) significantly extends the lifespan of any strap.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only