Technical Archive

Certina
DS-2 C024.618.11.051.01— lug 20mm

Certina DS-2 C024.618.11.051.01: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

DS-2 Chronograph Flyback Stainless Steel / Black / Bracelet

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Certina C024.618.11.051.01
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

C024.618.11.051.01

Movement

ETA caliber 251.294 PRD Hours, Minutes, Small Seconds | Date | Chronograph, Flyback

The Heritage

The Certina DS-2 reference C024.618.11.051.01 is equipped with the ETA 251.294 PRD caliber with hour, minute, small second, date and flyback chronograph functions. The quartz movement offers the possibility to instantly reset and restart the chronograph measurement. The watch is part of the DS (Double Security) collection of the Swiss brand.

FAQ

What is the lug width of the Certina DS-2 C024.618.11.051.01?

The lug width of the Certina DS-2 C024.618.11.051.01 is 20 millimetres. This measurement is the essential technical parameter for purchasing a compatible strap and must be measured perpendicularly between the internal points of the two case lugs, not to be confused with the 43-millimetre case diameter.

What is the best strap material for the Certina DS-2 C024.618.11.051.01?

The Certina DS-2 C024.618.11.051.01, being a professional chronograph with stainless steel case, benefits from superior alligator leather straps for refined aesthetic dialogue, or from bovine leather with vegetable tanning to develop visible patina over time. For versatility, high-density nylon NATO straps offer multiple compatibility without compromising robustness. For marine environments or high perspiration, FKM rubber maintains sporting functionality.

How do you change the strap on a 20mm lug-width watch?

To change the strap on a 20-millimetre lug-width watch, a spring bar tool (pin removal tool) is required: insert the flat fork of the tool into the gap between the spring bar and the case, then apply gentle perpendicular pressure to free the bar's end. Repeat the operation on the opposite side. During this manoeuvre, keep the watch on a soft surface to avoid scratches on the stainless steel case.

Is an aftermarket strap compatible with the Certina DS-2 C024.618.11.051.01?

Yes, any strap with 20-millimetre lug width is mechanically compatible with the Certina DS-2 C024.618.11.051.01, provided the strap lugs are designed to accommodate standard spring bars. However, aesthetic compatibility depends on the proportion between case diameter (43 millimetres) and strap width: thin materials may appear visually unbalanced against the substantial sporting case.

How long does a leather strap last on a chronograph like the Certina DS-2 C024.618.11.051.01?

A superior-quality leather strap, such as alligator or vegetable-tanned calf, subjected to moderate daily use, maintains structural integrity for 3-4 years. Accelerated ageing occurs in high-perspiration or humid environments (marine, tropical). The natural patina developing on vegetable leather is not deterioration but aesthetic enrichment. Annual strap replacement is recommended practice for intense professional use, where frequent cleaning and constant perspiration accelerate fibre wear.