Certina
DS Eagle C0237101705100— lug 20mm

The lug width (ansa width) of the Certina DS Eagle C0237101705100 is 20 millimetres. This measurement is determined by the internal distance between the two lug shoulders where the strap inserts. Verifying this dimension is critical before ordering an aftermarket strap to ensure a perfect fit without gaps or obstructions.

The optimal choice depends on intended use. For elegance and daily wear, we recommend an Italian alligator with vegetable tanning or naturally dyed calf leather; for sporting versatility, a ballistics NATO in high-density nylon; for intensive water environments, an FKM (Viton) rubber. All must be 20mm lug width.

Insert the bevelled end of a spring bar tool into the small hole positioned beneath the watch lug, near the internal spring. Press gently inward to release the tension spring, extract the bar, and remove the old strap. Repeat in reverse to install the new 20mm strap, ensuring the springs are securely anchored.

Yes, provided it is the correct lug width of 20 millimetres. All 20mm straps—leather, NATO, rubber—are compatible with this model. We recommend high-quality construction straps to preserve the aesthetic integrity of the case.

A premium leather strap (alligator, calf) typically lasts 3–5 years with standard maintenance: periodic cleaning with a damp cloth, avoiding prolonged direct sunlight and stagnant humidity. Vegetable-tanned leather develops a patina that improves over time, extending useful life to 7–10 years. Synthetic straps average 2–3 years of reliable use.