Strap for Graphic Sutnar Chameleon Green

The Robot Watch Graphic 1901ST07 features a 20mm lug width, an uncommon size that requires specifically matched straps. This dimension was deliberately chosen by the manufacturer to maintain visual balance between the 42mm case and overall case proportions. Any compatible strap must be precisely 20mm wide to fit correctly into the case lugs without play or forcing.

We recommend a 20mm alligator leather strap in dark brown or black, which accentuates the clean geometry of the stainless steel case. Vegetable-tanned alligator develops a natural patina that harmonises beautifully with steel aging. Alternatively, vegetable-tanned calf leather provides comfort and fascinating colour evolution. For sports use, a twisted nylon NATO maintains the minimalist aesthetic of the model.

Strap change is straightforward: obtain a spring bar tool. Position the flat end under the pin supporting the strap on the case lug, apply gentle pressure to compress the internal spring, and extract the pin. Repeat on the opposite side. Align the new strap holes, reintroduce the pin from the opposite lug, and verify firm positioning. The operation requires only minutes and no specialist tools.

Yes, absolutely. The Graphic 1901ST07, like most 20mm lug width watches, accepts quality aftermarket straps. It is essential that the strap is designed for 20mm lug width and uses compatible pins (universal standard). Artisanal leather straps, such as those created by Casati Milano, offer superior quality to original straps and allow complete aesthetic personalisation of your watch.

Durability depends on leather quality and intensity of use. A high-quality artisanal alligator or vegetable-tanned calf strap typically lasts 3-5 years with daily wear. More delicate leather may last 1-2 years. Natural aging is not deterioration but aesthetic transformation: the patina that develops is a sign of longevity. Regular maintenance (drying after water contact, occasional conditioning with specific creams) significantly extends strap life.