Strap for Big Bang Unico 45 Blue Sapphire

No. The bracelet is integrated directly into the case via a proprietary H-shaped attachment system. A standard strap has no way of connecting — the geometry simply does not allow it. What I do in the atelier is build the strap from scratch, starting from the actual watch, not from a spec sheet.

I work by appointment only, at <a href="/pages/casati-booking">Casati Milano</a>, Via XX Settembre 15, Milan. I bring the watch to the bench, take measurements directly from the case and craft the attachments to the millimetre, respecting the exposed screws and the titanium-resin geometry. There is no template: every piece is built from zero on that specific watch.

I prefer matte-finish Mississippi alligator, hand-finished with raw-cut edges. The Big Bang has a strong, industrial character: a glossy or overly formal leather would look out of place. Matte holds the conversation with the resin and titanium without overpowering or yielding. It is the choice I would make for myself.

With ordinary care — keeping it away from prolonged water exposure, letting it dry naturally, conditioning the leather twice a year — I comfortably reach ten years of daily wear. Quality leather does not deteriorate: it transforms. The edges soften, the colour deepens. It is an honest ageing, one that tells the story of time spent on the wrist.

The Big Bang was born in 2005 with a structure deliberately conceived as composite: resin, titanium and sapphire in the same case, held together by exposed screws that do not hide but become part of the design. It is not an aesthetic detail — it is a precise engineering decision. I have seen many sports watches over the years: few show their own construction with this level of honesty.