hi there
the watch back will be secured in one of 3 ways dependant on the model
it will either be (the easiest ) a push on back this will be smooth all over no markings on the actual back of the watch
these backs are removed by locating a small grove between the case and the back and inserting the edge of a small knife and popping the back off
way 2 a screw fit back this would have 6 or 8 large groves around the outside edge of the back these can be removed with 2 screwdrivers one on opposite side of the back one in each groove and twisting counter clockwise (if in any doubt take it to a jewellers these arnt as easy as youd think
the third would be a oster back like on the rolex this is very unlikely but if it is dont try and remove these yourself
luke, July 2008
