Abstract: A watch case including a middle defining a peripheral track; a rotating bezel; a toothed crown; a structure for detachably fastening the bezel on the middle with the possibility of axial clearance, the fastening structure includes a band supporting radially projecting fins, each capable of engaging with a bayonet formed in the middle; a coupling system including a male part and a female part, one of which is integral with the bezel and the other one of which is integral with the fastening structure, with this coupling system being able to adopt a decoupling configuration, in which the male part and the female part are decoupled, and a coupling configuration, in which the male part and the female part are coupled.

Abstract: A watch case including a middle defining a peripheral track; a rotating bezel; a toothed crown; a structure for detachably fastening the bezel on the middle with the possibility of axial clearance, the fastening structure includes a band supporting radially projecting fins, each capable of engaging with a bayonet formed in the middle; a coupling system including a male part and a female part, one of which is integral with the bezel and the other one of which is integral with the fastening structure, with this coupling system being able to adopt a decoupling configuration, in which the male part and the female part are decoupled, and a coupling configuration, in which the male part and the female part are coupled.