Adjustable snooze timer for mechanical watches

An alarm mechanism arranged to control the motion of at least one mechanical actuator cooperating with a striking mechanism controlled by a timepiece movement, and comprising a timer for setting a snooze time, wherein said timer is entirely mechanical and comprises first control means able to be actuated at a first moment by a user during the playing of an alarm chime in order to disengage said actuator and momentarily stop said alarm chime, and wherein said timer includes mechanical timing means arranged to automatically cause said alarm chime to play again at a second moment, after a predefined duration from said first moment, wherein said timer includes a release cam indirectly controlled by said first control means and which is arranged to control the pivoting of a hammer lever, comprised in said timer, which hammer lever, depending on the angular position thereof, releases or locks said actuator to allow or respectively prevent the playing of an alarm chime.