Strap for Horological Machine N°3 HM3 Frog X Purple

No. The bracelet is integrated directly into the sapphire case — there are no proprietary lugs where a standard strap would attach. For this model, I work in the atelier: I craft a bespoke strap, shaping the attachments directly onto the case geometry.

You visit <a href="/pages/casati-booking">Casati Milano</a>, by appointment only. I take measurements directly from your case, studying every angle of the sapphire structure. From there, I build the attachments by hand, calibrating them precisely to your specific case.

I prefer translucent Mississippi alligator or ultra-thin Swift. This watch is pure architecture, sapphire glass that breathes — a heavy leather would betray it. I look for materials that don't diminish the visual lightness of the design.

With proper care, 8–12 years of daily wear. Leather evolves: it patinas, softens. It ages beautifully if you respect it — once a year, a light cream conditioning, avoid standing water. Then back to the atelier for a touch-up, if needed.

Because it is industrial sculpture first, conventional watch second. The 496 hours of labour and 11 sapphire blocks create radical, asymmetric geometry. No standard attachment respects that total transparency — it takes bench craft to integrate without betrayal.