Strap for Rectangular Date 30 Stainless Steel / Black - Roman

The lug width is 21mm. This measurement represents the inner distance between the two lugs of the case, measured shoulder to shoulder without including the case thickness itself. This is a rare dimension in the contemporary market, as 20mm and 22mm are the widespread standards. For the Rectangular model, it is essential to seek straps specifically constructed for this width, as there is no room for approximation.

For this minimalist rectangular model, we recommend straps in exotic leather with vegetable tanning, such as alligator or natural reptile, which enhance the linear geometry of the case through natural texture and patina. Alternatively, chocolate-coloured calf leather with vegetable finishes creates understated elegance. For practicality, woven NATO or butadiene rubber maintain the design's sobriety whilst ensuring water resistance and easy cleaning. The choice depends on intended use: formal wear demands structured leather; sport wear favours fabric or rubber.

The change requires specific tools: removal of the spring bars (the pins connecting the strap to the lugs) with a dedicated tool. Position the watch on a soft surface to avoid scratches. Slightly compress the spring bar on the opposite side with the tool, remove the worn strap, insert the new one by aligning the holes within the lug, and reposition the spring bar until it clicks into retention. If you prefer to avoid risk, Casati Milano offers a strap-change service by appointment at the atelier.

Yes, provided the strap is specifically constructed for a 21mm lug width. Artisanal aftermarket straps often offer superior quality and customisation compared to OEM options. Always verify measurements match: lug width 21mm, total length suitable for your wrist (typically 110mm on the short side and 75mm on the long side for average proportions). Quality aftermarket leather straps can transform the tactile experience of the watch.

Durability depends on frequency of wear, climate, and tanning quality. A well-maintained vegetable-tanned leather strap, worn daily in temperate conditions, lasts 3–5 years before showing structural failure signs (stretching, fibre fragility). Exotic leathers such as alligator or cordovan, thanks to molecular density, resist longer—up to 7–10 years. Periodic maintenance with specific balms extends lifespan. Rubber or woven NATO straps offer superior durability (10+ years) but require more frequent cleaning.