Technical Archive

Certina
DS First C0142173701100— lug 17mm

Certina DS First C0142173701100: 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

C0142173701100

Movement

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

The Heritage

The Certina DS First is equipped with the ETA 251.471 caliber with chronograph, hours, minutes, small seconds and date functions. The model features 17mm lugs and a quartz movement with chronograph complication. The reference C0142173701100 is part of the DS collection characterized by high resistance to shocks and water.

FAQ

What is the lug width of the Certina DS First C0142173701100?

The lug width of the Certina DS First C0142173701100 is 17mm. This measurement refers to the distance between the two internal attachment points where the strap is inserted into the case. Measurement must be taken from inner edge to inner edge, excluding any decorative elements on the case.

Which type of strap is best suited for the Certina DS First C0142173701100?

The Certina DS First C0142173701100, given its compact diameter and chronographic movement, accommodates multiple solutions. For a formal approach, a black alligator strap conveys elegance. For everyday versatility, vegetable-tanned calf leather develops a fascinating patina over time. For a sporty aesthetic consistent with the tool-watch nature, a NATO strap in synthetic fabric or a vulcanised rubber strap offer practicality and water resistance.

How do I change the strap on the Certina DS First C0142173701100?

The procedure requires a specific tool: spring bar tools (levers for the lug springs). Position the watch with the case facing upward, locate the holes on the lugs where the spring is housed, and gently depress the spring downward. The old strap will be released from the lug. Repeat the operation on the other side. To insert the new strap, align the ends with the lugs and press the spring downward until you hear a click indicating proper engagement. Verify that the strap is securely fastened before wearing the watch.

Can I use an aftermarket compatible strap with the Certina DS First C0142173701100?

Yes, absolutely. It is essential to select a strap with a lug width of exactly 17mm, as specified for the C0142173701100. Quality aftermarket straps often offer superior aesthetic options and materials compared to the original strap, allowing versatility in customising your instrument. Always verify technical compatibility before purchase.

How long does a leather strap last on the Certina DS First C0142173701100?

The longevity of a leather strap depends on frequency of use, climatic conditions, and the type of tanning. A vegetable-tanned calf strap typically lasts 18–24 months with daily wear, whilst an alligator strap properly maintained can exceed 3–4 years. Vulcanised rubber lasts longer (5+ years) but gradually loses grip over time. Regular maintenance—avoiding excessive moisture and dirt—significantly extends strap lifespan.