Escape valve for a watch

A timepiece comprising:

• an escape valve, comprising an outlet channel arranged to be in fluid communication with an interior of a case of said timepiece when the escape valve is in an open configuration in order to evacuate an excess of fluid, said escape valve including,
• a tube intended to be fixed in the case of the timepiece,
• a valve head provided with a cover and with an axial skirt which is adapted to be placed in different axial positions in relation to said tube,
• a pressure control module separate from the valve head arranged in the interior of a fluid conduit provided in the tube,
• axial guide elements by screwing defined in the valve head and the tube configured to control displacement of the valve head relative to the tube in the different axial positions, and
• blocking elements preventing a disassociation between the valve head and said tube, said blocking elements being included in an external wall or internal wall of the tube and in the valve head.