Strap for Senator Cosmopolite Red Gold / Silver / Alligator / Folding

The lug width of the Senator 1-89-02-01-05-30 is precisely 21mm. This specific constructive specification requires a strap with an internal width of exactly 21mm. Verify by measuring the distance between the inner shoulders of the case with a digital calliper; tolerance must remain within ±0.5mm.

A superior-quality alligator with regular grain represents the most coherent choice from an aesthetic and constructive perspective. Alternatively, calf leather with vegetable tanning in warm colours (cognac, brown) or black shell cordovan offer deep patinas compatible with the tactile density of rose gold. NATO and rubber introduce deliberate contrast, appropriate for less formal contexts.

Remove the spring bar located inside the lug using a dedicated tool or a blunted pointed object. Move the spring bar foot downwards to release the lug; remove the previous strap and insert the new one by aligning the lugs to the seats. The spring bar must click into position. If uncertain, entrust the operation to a professional watchmaker or contact Atelier Casati Milano for in-workshop service.

Yes, provided the lug width is exactly 21mm and the strap is constructed with materials and finishes coherent with Glashütte standards (leather thickness 2.5–3mm, natural leather backing layer, marked stitching). Avoid undersized straps or products with synthetic leather, which would alter the aesthetic balance of the rose gold case.

An alligator or vegetable-tanned calf strap of superior quality lasts an average of 5–7 years of daily wear, provided it undergoes regular maintenance (cleaning with damp cloth, annual conditioning with specific creams). Shell cordovan, due to its molecular density, achieves 10–15 years. Durability varies based on ambient humidity, frequency of use and wearing style.