Strap for DS-1 Big Date Powermatic 80 Special Edition

The lug width of this model is 20 millimetres. This measurement must be verified from the left shoulder to the right shoulder of the lug (the pin holder), excluding the pin itself. This is critical to ensure a perfect fit for any strap, whether leather, textile, or rubber.

There is no absolute choice; it depends on your personal interpretation. Vegetable-tanned calf leather is ideal if you seek aesthetic harmony and ageing character; NATO for sports applications and versatility; shell cordovan for subtle distinction; FKM rubber for prioritising functionality. The correct choice reflects how you will wear the watch daily.

Strap replacement requires a dedicated tool (spring bar tool) to compress the springs holding the strap to the lugs. Remove the old strap by pushing the pin downward, then insert the new one by aligning it to the lug shoulders and releasing the spring. If unfamiliar with the procedure, a certified watch service centre can perform this task.

Any strap with a 20-millimetre lug width is compatible. We recommend verifying: correct width (20mm), construction quality (precise stitching, authentic material), and aesthetic coherence with the minimalist philosophy of the DS-1. Our artisanal straps are tested to ensure perfect fit on this reference.

A quality calf leather strap, worn daily, typically lasts 3-5 years. Longevity depends on ambient humidity, frequency of strap changes, and leather conditioning practices. Shell cordovan resists longer due to the natural density of equine fibre. The patina that develops is desirable and testifies to the authenticity of the material.