Kenko kk-617a and Nako na-617a user manual.

Operational Flow:
When "S" or "D" key is used in the stopwatch mode or the alarm time setting mode, the time is obtained by pressing "M" key.
a.Stopwatch used:
1.Press "M" key for stopwatch mode.
2.Press "D" key to start counting 1/100 sec.
3.Press "D" key to stop. - Press "S" key for the stopwatch mode reset.
4.Press "M" key to real time mode.
b.Alarm time setting:
1.Press "M" twice for alarm mode, then press D and S key to adjust.
2.Hour or minute after pressing "M" key once.
3.Press "S" and "D" to enable or disable on alarm function mode.
c.Real time setting:
1.Press "M" key three timed for setting mode, then
2.Press "S" key to select for minute, hour, date, mounth and week day.
3.The following steps digit that can be advanced by pressing "D" key. After the procedure, it should be pressing by "M" key once.