Removable acoustic radiating membrane for a musical watch or striking watch and watch including the same

A removable acoustic radiating membrane for a musical watch or a striking watch, wherein the membrane can be removably fixed between a middle part and a back cover of a watch case, the membrane comprising:

• a retaining member that, when positioned between the middle part and the back cover of the watch case, cooperates with an inner stop member of the back cover arranged entirely inside the watch case, to limit bending of the membrane following significant excess pressure or vacuum pressure according to environmental conditions, the retaining member being T or L-shaped with a stem fixed to a base part of the membrane and a tongue fixed to the stem parallel to the base part,
• wherein the tongue is rectangular, a width of the tongue being sized for insertion thereof in a housing in the inner stop member of the back cover of the watch case, and a length of the tongue being sized to retain the tongue in the housing following a bayonet type assembly in the housing.