Strap for DS PH200M Stainless Steel / Blue / NATO

The lug width is 20.00mm. This width is specific to this Certina model and corresponds to the distance between the two case lugs. To measure correctly, observe the internal space between the two case horns where the strap is inserted: it must be exactly 20mm. A measurement error of even 1mm compromises the installation of an aftermarket strap.

The ideal strap depends on your intended use. Alligator leather with vegetable tanning and medium-fine grain communicates sobriety and craftsmanship, counterweighting the case's modern geometry. A brushed box calf offers greater formality. A cotton-polyester NATO maintains technical connotation and allows rapid strap changes. A high-density FKM rubber represents the radically instrumental choice, durable and aesthetically understated.

Obtain a dedicated spring bar tool. Support the strap with one hand and insert the tool's thin end into the opening of the spring pin. Press inward to release the spring and slide the pin towards you. Repeat on the opposite side. To install the new strap, insert both pins into the lug slots and push them with the spring bar tool until the spring fully engages. Verify the strap is secure before wearing the watch.

Yes, provided the strap is designed for 20mm lug width. High-quality artisanal straps, crafted from alligator, calf, NATO, or FKM rubber, are fully compatible with this model. Ensure the strap width is proportionate to the 42.80mm case diameter: a 20mm lug width accepts 20mm straps without modification.

Durability depends on material and frequency of use. Quality alligator leather with vegetable tanning typically lasts 3–5 years with daily wear, acquiring a natural patina that enhances character. Brushed box calf tends to last 2–4 years. Vegetable-tanned leather ages beautifully, developing rich patina, whilst FKM rubber straps maintain structural properties virtually unchanged for 5–7 years without significant aesthetic degradation.