Technical Archive

Certina
DS First C0142171705100— lug 17mm

Certina DS First C0142171705100: 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

C0142171705100

Movement

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

The Heritage

The Certina DS First features the ETA 251.471 quartz calibre with chronograph, hours, minutes, small seconds and date functions. The watch has 17mm lugs and is part of the Swiss brand's DS collection. The quartz movement offers chronometric precision with analog display of the time functions.

FAQ

What is the exact lug width of the Certina DS First C0142171505100?

The lug width of the Certina DS First C0142171505100 is 17mm. This specification determines compatibility with aftermarket straps. To verify it correctly, use a digital calliper to measure the internal distance between the two lugs supporting the original strap. Precise measurement is essential to avoid improper fitting.

Which strap do you recommend for the Certina DS First C0142171505100?

For the DS First C0142171505100, we recommend authentic alligator straps (black or chocolate tones) for formality, or vegetable-tanned calf leather for daily versatility. For practicality, cotton NATO offers quick replacement options. For humid environments or sports, FKM rubber ensures durability without technical compromise. Your choice depends on wearing context.

How do you change the strap on the Certina DS First C0142171505100?

Strap replacement requires a specific tool called a spring bar remover. Position the watch lug-side up, insert the tool into the small hole beneath the lug, gently lift the pin until it disengages, then remove the strap. Reverse the process with the new strap, ensuring the pin clicks firmly into place. If inexperienced, consult an authorised service centre.

Do quality aftermarket straps solve compatibility issues for the Certina DS First C0142171505100?

Yes, a quality artisanal strap in 17mm lug width is fully compatible with the DS First C0142171505100. Our straps are manufactured with precise tolerances to ensure flawless fitting. Always verify that the strap is certified for 17mm lug width before purchase.

How long does a natural leather strap last on the Certina DS First C0142171505100?

Durability depends on material and daily use. An authentic alligator strap withstands 3–5 years with regular wear, whilst vegetable-tanned calf lasts 2–4 years. Moisture, perspiration, and sun exposure accelerate ageing. Quality leather develops noble patina; when worn, timely strap replacement preserves the case.