Some models may have a button which is recessed in the watch case to prevent accidental input.
Shape of the button differs depending on the design of the watch.
Upper half of the button is covered.
Press the lower half of the button or press the hollow in the middle using an object with a long tapered tip.
The button is covered except the hollow in the middle.
Press the hollow in the middle using an object with a long tapered tip.
The button is recessed in the watch case.
Press the hollow in the middle using an object with a long tapered tip.