Man

Model: 1015471_A (for Men's watch)
Battery: LR754 Face: LCD 4 digit Light: Yes Year: 1979 Buttons: Three buttons are used, top right and bottom right (light) and center right.
Function: It displays hours, minutes, seconds, and the day of the week, and has a stopwatch with hundredths of a second. It does not have a built-in light.
Info: This module is used in the following modelTI-455-32

Here you can see the particular contact that is used by the button when pressed. Three buttons are used, the top right to display the date and seconds, the bottom right to activate the micro bulb needed for illumination and the center right, a flush button to set the time and date.