When I saw this, it occurred to me that this bracelet from Uno a 50 looks an awful lot like a Cartier Juste un Clou bracelet, albeit somewhat deconstructed. Their description: UNOde50 iconic bracelet: rigid, silver plated metal with an original open design in the form of a modelled nail almost in a spiral shape, with a spring in its centre that lets you open or close it. Disruptive and transgressive, it is perfectly adapted to the shape of the wrist. Its unique style defines the pioneering spirit of UNOde50. 100% handcrafted in Spain.
This sells for USD$145.