Module

Model: 1014101_00 (for Men's watch) Diameter: 27 mm Thickness: 6 mm
Battery: LR754 Face: LCD 4 digit  Light: NO Year: 1980 Buttons: Three buttons are used, top right, center right and bottom right.
Function: Displays hours, minutes, seconds, day, and month, with a stopwatch to the second. It does not have a built-in light.
Info: This module is used in the following model TI-562-20 This could be one of the early circuit prototypes, as the very same module 1014101-11, with identical functions and a clearly printed code—is also used in the TI-562-10 and TI-562-11 models, which feature the same functionality. 

Here you can see the specific contact used by the buttons when pressed. Three buttons are used, one in the top right, one in the center right, and one in the bottom right. The top right button allows you to select the time, date, and seconds; the center right button is used to set functions such as the time and date; while the bottom right button allows you to start a stopwatch to the second.