Watch having an in interchangeable bezel

A watch comprising;

• a watch case having a bottom surface, a side surface and a top surface;
• a detachable bezel having a bottom surface and is oriented to removably engaging the watch case and wherein the bezel and watch case are interlockable, and with the watch case serving for axial retention of said bezel on said watch case when the bezel is given a rotational movement relative to the watch case, and further including a laterally movable locking post on the watch case and a locking recess on a bottom surface of the bezel to prevent the movement of the bezel relative to the watch case when a predetermined rotation angle has been affected by the bezel for preventing removal of said bezel from said watch case, said locking post being movably mounted in said watch case and including a manually movable button on said side surface of said watch case for enabling lateral movement of said locking post between a first position wherein the locking post is engageable in the locking recess and a second position wherein the locking post is disengageable from the locking slot of the bezel;
• wherein the button on the side surface of the watch case is biased in the first position and is movable to the second position by depressing the button;
• wherein said locking post extends upwardly from the top surface of the watch case and is oriented to enter and then engage a locking slot in the locking recess;
• and
• wherein the bezel and the watch case each include inner periphery and outer periphery areas and bear a plurality of complementary raised projections and recessions along their innerperiphery and said projections and recessions being arranged to complementarily engage each other upon rotation of the bezel relative to the watch case.