Technical Archive

Certina
DS First C0142173601100— lug 17mm

Certina DS First C0142173601100: 17mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Artisanal Note

"This model requires a precise 17mm lug width to preserve the original sartorial balance."

Lug Width

17 mm

The essential strap measurement.

Browse 17mm straps →

Reference

C0142173601100

Movement

ETA caliber 251.471 Hours, Small Seconds, Minutes | Date | Chronograph

The Heritage

The Certina DS First C0142173601100 is a compact 34.80 mm steel and black ceramic chronograph embodying Swiss rigorous construction from the historic DS (Double Security) family, dating back to military and civilian reliability standards of the 1960s. It houses the ETA 251.471 Swiss quartz movement with hours, minutes, small seconds, date, and chronograph functions, designed for genuine everyday use with a sleek vintage-sport aesthetic. The 17 mm lug width is a precise ergonomic choice for slender wrists, requiring specialized strap research due to limited standard industry availability.

FAQ

What is the lug width of the Certina DS First C0142173601100?

The lug width of the Certina DS First C0142173601100 is 17.00 mm. This is a non-standard lug width that requires sourcing specific watch straps, as most manufacturers focus on 18, 20, or 22 millimetres. To verify compatibility, measure the distance between the two lugs using a digital calliper: the value must be exactly 17 mm.

What is the best strap for the Certina DS First C0142173601100?

The choice depends on intended use. For formal occasions, we recommend an alligator or shell cordovan strap, which enhance the elegance of the black ceramic case. For versatile daily wear, vegetable-tanned calf leather ages beautifully and offers durability. For sports or aquatic applications, a NATO strap in canvas or vulcanised rubber provides robustness and easy changing. All must feature a 17 mm lug width.

How do you change the strap on the Certina DS First C0142173601100?

Strap changing requires a spring bar tool with interchangeable heads or a dedicated extractor. Locate the two lateral pins holding the strap and insert the flat head of the tool beneath each pin, applying gentle downward pressure to release the internal spring. Once the pins are extracted, the old strap detaches easily. Position the new strap opposite, aligning the holes at the ends, and gently push the pins until they click. Verify the strap is firmly secured before wearing the watch.

Is an aftermarket 17 mm strap compatible with the C0142173601100?

Yes, any quality strap certified with a 17 mm lug width is fully compatible. Artisanal aftermarket straps often surpass original straps in construction quality and material refinement, offering greater variety in finishes, leathers, and styles. Ensure the supplier explicitly specifies a 17 mm lug width and that the strap is constructed to precision standards, so the pinholes are perfectly aligned.

How long does a leather strap last on the Certina DS First C0142173601100?

Leather strap durability depends on material quality, tanning method, and intensity of use. A vegetable-tanned calf strap, worn daily in normal conditions, maintains structural integrity for 3–5 years. Premium leather, such as shell cordovan or natural alligator, can last 5–8 years or longer. Regular maintenance (gentle cleaning, protection from excessive moisture and direct sunlight) significantly extends useful life. Initial failure typically manifests as tears at edges or local hardening; at that point, a professional can repair or recommend replacement.